add Gemfile.lock to .gitignore
add test for posts#update action
edit TODO comment in posts#create action
Merge branch 'master' into develop

Conflicts:
	Gemfile.lock
	test/controllers/posts_controller_test.rb
extract post creation to separate method in posts controller test
extract new title to variable in posts#update action test
delete wrong fixme's
implement posts#update test with factories only
implement posts#show test
Merge branch 'release/0.0.1'