Updated Language Detection

I added a more robust (though not perfect) language detection library to get better results for English tweet detection.

The primary changes are:
1. Added the language detector object to the util directory.
2. Updated the isEnglish method in the LanguageUtil.scala to use the new language detector
3. Added language profiles to the resources directory
4. Added an EnglishStatusStreamer and EnglishStatusListener for easy manual examination of the tweet stream.
5. Update the build.sbt file to include the language detection library dependency