Fix public API declaration

src/StringFuriganaExt.swift

@@ -10,12 +10,12 @@ import Foundation
 
 public struct Furigana
 {
- let text: String
- let original: String
- let range: NSRange
- let UUID: NSUUID = NSUUID()
+ public let text: String
+ public let original: String
+ public let range: NSRange
+ public let UUID: NSUUID = NSUUID()
 
- init(text: String, original: String, range: NSRange)
+ public init(text: String, original: String, range: NSRange)
  {
  self.text = text
  self.original = original
@@ -52,12 +52,12 @@ private let kCharLength = 1
 public extension NSString
 {
 
- func substringAtIndex(index: Int) -> String
+ public func substringAtIndex(index: Int) -> String
  {
  return substringWithRange(NSMakeRange(index, kCharLength))
  }
 
- func filteredString(predicateBlock: (NSString) -> Bool) -> NSString
+ public func filteredString(predicateBlock: (NSString) -> Bool) -> NSString
  {
  var result = ""
 
@@ -71,7 +71,7 @@ public extension NSString
  return result
  }
 
- func enumerateCharacters(enumeration: (Int, NSString) -> Void)
+ public func enumerateCharacters(enumeration: (Int, NSString) -> Void)
  {
  for i in 0..<length
  {