Split out the 3 match types (email, twitter, and url) into separate classes, in preparation to pass them to the replaceFn

Also add utility methods.

Author: gregjacobs

Gruntfile.js

@@ -43,7 +43,17 @@ module.exports = function(grunt) {
 						return '\t' + src.replace( /\n/g, '\n\t' );  // indent each source file, which is placed inside the UMD block
 					}
 				},
-				src: [ 'src/umdBegin.js', 'src/Autolinker.js', 'src/AnchorTagBuilder.js', 'src/umdEnd.js' ],
+				src: [
+					'src/umdBegin.js',
+					'src/Autolinker.js',
+					'src/Util.js',
+					'src/AnchorTagBuilder.js',
+					'src/Match.js',
+					'src/EmailMatch.js',
+					'src/TwitterMatch.js',
+					'src/UrlMatch.js',
+					'src/umdEnd.js'
+				],
 				dest: 'dist/Autolinker.js',
 			},
 		},

dist/Autolinker.js

@@ -156,7 +156,7 @@ Autolinker.AnchorTagBuilder.prototype = {
 
 
 	/**
-	 * Removes any trailing slash from the given `anchorText`, in prepration for the text to be displayed.
+	 * Removes any trailing slash from the given `anchorText`, in preparation for the text to be displayed.
 	 * 
 	 * @private
 	 * @param {String} anchorText The text of the anchor that is being generated, for which to remove any trailing