Redesign issues, mr lists

app/assets/stylesheets/common.scss

app/assets/stylesheets/sections/dashboard.scss

app/assets/stylesheets/sections/issues.scss

app/assets/stylesheets/sections/merge_requests.scss

app/assets/stylesheets/sections/votes.scss

app/helpers/merge_requests_helper.rb

app/helpers/projects_helper.rb

app/views/dashboard/issues.html.haml

app/views/dashboard/projects.html.haml

app/views/dashboard/show.html.haml

app/views/groups/issues.html.haml

app/views/groups/show.html.haml

app/views/issues/_issue.html.haml

app/views/issues/index.html.haml

app/views/merge_requests/_merge_request.html.haml

app/views/merge_requests/index.html.haml

app/views/milestones/show.html.haml

app/views/repositories/tags.html.haml

app/views/teams/issues.html.haml

app/views/teams/show.html.haml