Starting to remove Checker.java, added better link comparing with Twitter

-Made method to unshorten links (specifically t.co, but any work)
--Mostly for Twitter
--Only used on Twitter
-Made TwitterReader use less data when getting latest tweet
--Currently saves last found ID and gets the tweets after it
-Moved sendTestEmail() to Email.java
-Added TicketCheck.java dn CommandLine.java
--Separate classes for different check methods (GUI vs. CLI)
--Unused, simply a framework with some code