Fix visiblity of project description
add authentications link.
Add grape and grape-jbuilder gem
Fix project actions
Fix bug in reload projects#show
Fix bug in render projects#index page
Tweak design
Fix bug in listing issues list on projects#show
Merge pull request #226 from kmiyake/iss-223_fix_project_actions

Fix bug in project actions
Merge pull request #225 from kmiyake/iss-224_add_grape_gem

Add grape and grape-jbuilder gem
Merge pull request #221 from kmiyake/iss-218_fix_visiblity_of_project_description

Fix visiblity of project description
Bump up github_api gem
Merge pull request #228 from kmiyake/hotfix

Bump up github_api gem
Merge pull request #222 from masoo/issues_add_authentications_link

add authentications link.