added workaround for margin bug for pages
fixed names for contribution assets
second draft of contribution process

adding contribution
listing contributions
gitub_api gem
added links to index page with contributions and page of contribution
added integration of github avatars
moved user-erb template to haml
changes layout for user show
towards contribution process

linked user with his contributions
work with index/show pages of user/contribution
moved user#index to haml templating
ui changes, added select box for choosing repo during contribution process

added gem 'mechanize' for web-scrapping
changed model contribution: uniq url
added field github_name for user
changed view for contributions#new
changed partial for viewing contribution
Merge branch 'master' into contribution

Conflicts:
	Gemfile.lock
Merge pull request #25 from 101companies/contribution

added second draft of contribution process with github integration and auth