Merge branch 'hotfix/fix_images'

* hotfix/fix_images:
  edit readme
  edit gitgnore
  fix glyphicons js
add second tabs to contests index for sujects
fix contests index
Merge branch 'feature/add_themes_to_contests_index' into develop

* feature/add_themes_to_contests_index:
  fix contests index
  add second tabs to contests index for sujects
Merge branch 'release/0.2.5'

* release/0.2.5:
  fix contests index
  add second tabs to contests index for sujects
  add default to contest subject
  add subject to contest
  fix avatar logo
  custom file field input
  comb organizations index
  add contest_url to contest_request
  hide popover on contest_requests forms
  edit glyphicons
  add logo to orgs
  add mini to glyphicons
  update gems
  fix locales
  rename grant_operators to organization
  edit color
  edit image
Merge tag '0.2.5' into develop

Add contests subjects

* tag '0.2.5':