Twitter service working, fixed a few bugs
-tika-core-1.3.jar added for MIME type parsing

TwitterService.java:
-API keys stored directly in source (THIS IS BAD, need to fix later)
-looks in coordinator.conf for user specific keys (none provided by default, and its a pain to get them without an interactive client)
-less staticy

Preferences.java, coordinator.conf:
-added support for reading twitter keys

-SimpleHttpServer.java:
-fixed bug in resource handler where connection was not closed after file contents sent
-fixed similar bug in widget xml handler
-switched to using tika for mime type guessing, fixing a bug where Internet Explorer would not use javascript/css/etc... that had the wrong mime type sent