(Maint) Ignore Gemfile.local

This ignores the Gemfile.local so that specific gems like fuubar can be applied.
Merge pull request #492 from ferventcoder/maint/stable/ignore_gemfile_local

(Maint) Ignore Gemfile.local
Merge remote-tracking branch 'upstream/stable'

* upstream/stable:
  (Maint) Ignore Gemfile.local

Conflicts:
	.gitignore