Travis: Renamed CI files

This fixes GitHub language detection
Removed support for Ruby 1.8.7
Committing basic working code, mark_as_read works so far. Need to test new user creation
When instantiating a new user read from klass.readable_options not self, self doesn't have meaning  in this context.
Time.current instead of Time.now
Merge branch 'refs/heads/all_but_most_recent'

Conflicts:
	lib/unread/readable.rb