Util Classes used by Tweetr.

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	Class	Description
	Base64Encoder	A utility class to encode a String or ByteArray as a Base64 encoded String.
	TweetUtil	Various Tweeter Helper Methods
	URLShortener	URL Shortener Class using http://is.gd/ public service
	URLUnshortener	URL Unshortener Class using http://untiny.me/ public service For a list of supported services see http://untiny.me/api/1.0/services/