Upgrade to Font Awesome v4.2

CHANGELOG

Gemfile

Gemfile.lock

app/assets/javascripts/application.js.coffee

app/assets/javascripts/behaviors/toggler_behavior.coffee

app/assets/javascripts/markdown_area.js.coffee

app/assets/stylesheets/gl_bootstrap.scss

app/assets/stylesheets/sections/notes.scss

app/helpers/application_helper.rb

app/helpers/events_helper.rb

app/helpers/icons_helper.rb

app/helpers/notes_helper.rb

app/helpers/notifications_helper.rb

app/helpers/projects_helper.rb

app/helpers/tree_helper.rb

app/views/admin/background_jobs/show.html.haml

app/views/admin/broadcast_messages/index.html.haml

app/views/admin/groups/_form.html.haml

app/views/admin/groups/index.html.haml

app/views/admin/groups/show.html.haml