General refactoring and cleaning

- Addition of programmer's name on top
- Addition of git backup in gitignore
- Cleanup of the imports, sorting
- Moving all utilities from jobs/ controllers/ to utils/
- Renaming tweets to Posts (for portability to other platform later on)
- Renaming of custom JS files to .custom.js for consistency
- Compiled version of venn.js, venn.min.js.
Merge branch 'master' of https://github.com/TweetAggregator/CrossStream

Conflicts:
	app/views/historical.scala.html