And some more bug fixes...

src/main/java/ch/njol/skript/SkriptConfig.java

@@ -151,7 +151,8 @@ public EventPriority convert(final String s) {
 	public final static Option<Integer> maxTargetBlockDistance = new Option<Integer>("maximum target block distance", 100);
 
 	public final static Option<Boolean> caseSensitive = new Option<Boolean>("case sensitive", false);
-	public final static Option<Boolean> allowFunctionsBeforeDefs = new Option<Boolean>("allow function calls before definations", false);
+	public final static Option<Boolean> allowFunctionsBeforeDefs = new Option<Boolean>("allow function calls before definations", false)
+			.optional(true);
 
 	public final static Option<Boolean> disableVariableConflictWarnings = new Option<Boolean>("disable variable conflict warnings", false);
 	public final static Option<Boolean> disableObjectCannotBeSavedWarnings = new Option<Boolean>("disable variable will not be saved warnings", false);

src/main/java/ch/njol/skript/classes/data/DefaultConverters.java

@@ -21,6 +21,8 @@
 
 package ch.njol.skript.classes.data;
 
+import java.util.Collection;
+
 import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.OfflinePlayer;
@@ -38,6 +40,7 @@
 import org.eclipse.jdt.annotation.Nullable;
 
 import ch.njol.skript.aliases.ItemType;
+import ch.njol.skript.bukkitutil.PlayerUtils;
 import ch.njol.skript.classes.Converter;
 import ch.njol.skript.entity.EntityData;
 import ch.njol.skript.entity.EntityType;
@@ -289,5 +292,21 @@ public EnchantmentType convert(final Enchantment e) {
 			}
 		});
 
+//		// Entity - String (UUID) // Very slow, thus disabled for now
+//		Converters.registerConverter(String.class, Entity.class, new Converter<String, Entity>() {
+//
+//			@Override
+//			@Nullable
+//			public Entity convert(String f) {
+//				Collection<? extends Player> players = PlayerUtils.getOnlinePlayers();
+//				for (Player p : players) {
+//					if (p.getName().equals(f) || p.getUniqueId().toString().equals(f))
+//						return p;
+//				}
+//				
+//				return null;
+//			}
+//			
+//		});
 	}
 }

src/main/java/ch/njol/skript/events/EvtClick.java

@@ -313,6 +313,8 @@ public static boolean checkUseOffHand(Player player, int clickType, @Nullable Bl
 				case STONE_BUTTON:
 				case COMMAND:
 				case ITEM_FRAME:
+				case SIGN_POST:
+				case WALL_SIGN: // 2 signs...
 					blockUsable = true;
 					break;
 				case CAKE_BLOCK:
@@ -357,7 +359,7 @@ public static boolean checkUseOffHand(Player player, int clickType, @Nullable Bl
 
 		// Still not returned?
 		if (mainHand.getType() != Material.AIR) return false;
-		//Skript.info("Main hand is an item.");
+		//Skript.info("Main hand is not item.");
 		if (offHand.getType() != Material.AIR) return true;
 
 		//Skript.info("Final return!");

src/main/java/ch/njol/skript/lang/function/Functions.java

@@ -98,14 +98,19 @@ final static void registerCaller(final FunctionReference<?> r) {
 	private final static Pattern functionPattern = Pattern.compile("function (" + functionNamePattern + ")\\((.*)\\)(?: :: (.+))?", Pattern.CASE_INSENSITIVE),
 			paramPattern = Pattern.compile("\\s*(.+?)\\s*:\\s*(.+?)(?:\\s*=\\s*(.+))?\\s*");
 
+	/**
+	 * Loads a function from given node.
+	 * @param node Section node.
+	 * @return Script function, or null if something went wrong.
+	 */
 	@SuppressWarnings("unchecked")
 	@Nullable
 	public final static Function<?> loadFunction(final SectionNode node) {
 		SkriptLogger.setNode(node);
 		final String definition = node.getKey();
 		assert definition != null;
 		final Matcher m = functionPattern.matcher(definition);
-		if (!m.matches()) // We have checks when loading the signature
+		if (!m.matches()) // We have checks when loading the signature, but matches() must be called anyway
 			return error("Invalid function definition. Please check for typos and that the function's name only contains letters and underscores. Refer to the documentation for more information.");
 		final String name = "" + m.group(1);
 		Signature<?> sign = signatures.get(name);
@@ -122,6 +127,12 @@ public final static Function<?> loadFunction(final SectionNode node) {
 		return f;
 	}
 
+	/**
+	 * Loads the signature of function from given node.
+	 * @param script Script file name (<b>might</b> be used for some checks).
+	 * @param node Section node.
+	 * @return Signature of function, or null if something went wrong.
+	 */
 	@Nullable
 	public static Signature<?> loadSignature(String script, final SectionNode node) {
 		SkriptLogger.setNode(node);
@@ -185,18 +196,35 @@ public static Signature<?> loadSignature(String script, final SectionNode node)
 		return sign;
 	}
 
+	/**
+	 * Creates an error and returns Function null.
+	 * @param error Error message.
+	 * @return Null.
+	 */
 	@Nullable
 	private final static Function<?> error(final String error) {
 		Skript.error(error);
 		return null;
 	}
 
+	/**
+	 * Creates an error and returns Signature null.
+	 * @param error Error message.
+	 * @return Null.
+	 */
 	@Nullable
 	private final static Signature<?> signError(final String error) {
 		Skript.error(error);
 		return null;
 	}
 
+	/**
+	 * Gets a function, if it exists. Note that even if function exists in scripts,
+	 * it might not have been parsed yet. If you want to check for existance,
+	 * then use {@link #getSignature(String)}.
+	 * @param name Name of function.
+	 * @return Function, or null if it does not exist.
+	 */
 	@Nullable
 	public final static Function<?> getFunction(final String name) {
 		final FunctionData d = functions.get(name);
@@ -205,6 +233,11 @@ public final static Function<?> getFunction(final String name) {
 		return d.function;
 	}
 
+	/**
+	 * Gets a signature of function with given name
+	 * @param name Name of function.
+	 * @return Signature, or null if function does not exist.
+	 */
 	@Nullable
 	public final static Signature<?> getSignature(final String name) {
 		return signatures.get(name);

src/main/resources/config.sk

@@ -145,11 +145,6 @@ case sensitive: false
 # This e.g. applies to the effect 'replace' and the conditions 'contains' and 'is/is not'.
 # Variable names are case-insensitive irrespective of this setting.
 
-allow function calls before definations: false
-# Whether scripts should be allowed to call functions that are not yet defined.
-# If enabled, functions' existences are checked after loading ALL scripts.
-# Warning: Unless you have text editor with good directory-search, it can be hard to find your functions!
-
 disable variable conflict warnings: false
 # Disables warnings of potential variable name conflicts if set to true.
 # I recommend to not touch this option, but if you do so you should at least set it back to false