Fix tab issue in Gemfile; Upgraded 5 gems by rebuilding Gemfile.lock fil...

 * Fix tab issue in Gemfile so it was consistent.
 * Upgraded 5 gems by rebuilding Gemfile.lock file.

 * **NOTE: After I upgraded the i18n gem, we are getting a deprecated warning. I will write this up separately.**
  * [DEPRECATED] I18n's :recue_format option will be removed from a future release. All exception messages will be plain text. If you need the exception handler to return an html format please set or pass a custom exception handler.