Merge pull request #3 from NadjaW/review_140903_infra

[Review] Request from 'NadjaW' @ 'NadjaW/memo/review_140903_infra'
add whitespace
add rake to Gemfile
Merge pull request #4 from NadjaW/review_140903_whitespace

add whitespace
Merge branch 'master' into review_140903_infra

* master:
  add rake to Gemfile
  add whitespace

Conflicts:
	Gemfile
	Gemfile.lock