add help option, add vendor directory

Gopkg.toml

@@ -0,0 +1,54 @@
+# Gopkg.toml example
+#
+# Refer to https://golang.github.io/dep/docs/Gopkg.toml.html
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#   name = "github.com/x/y"
+#   version = "2.4.0"
+#
+# [prune]
+#   non-go = false
+#   go-tests = true
+#   unused-packages = true
+
+
+[[constraint]]
+  name = "github.com/PuerkitoBio/goquery"
+  version = "1.4.1"
+
+[[constraint]]
+  name = "github.com/briandowns/spinner"
+  version = "1.1.0"
+
+[[constraint]]
+  name = "github.com/fatih/color"
+  version = "1.7.0"
+
+[[constraint]]
+  name = "github.com/joho/godotenv"
+  version = "1.2.0"
+
+[[constraint]]
+  name = "github.com/smartystreets/goconvey"
+  version = "1.6.3"
+
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/net"
+
+[prune]
+  go-tests = true
+  unused-packages = true

main.go

@@ -17,6 +17,11 @@ func main() {
 		os.Exit(0)
 	}
 
+	if len(os.Args) == 2 && os.Args[1] == "-h" {
+		displayUsage()
+		os.Exit(0)
+	}
+
 	words, withVoice, withMore := parseArgs(os.Args)
 	query(words, withVoice, withMore, len(words) > 1)
 }

utils.go

@@ -36,6 +36,7 @@ func displayUsage() {
 	color.Cyan("ydict <word(s) to query>        Query the word(s)")
 	color.Cyan("ydict <word(s) to query> -v     Query with speech")
 	color.Cyan("ydict <word(s) to query> -m     Query with more example sentences")
+	color.Cyan("ydict -h                        For help")
 }
 
 func isChinese(str string) bool {