[OPF #414] fixes issue description diff

- fixed journals_controller#diff
- adapt redmine diff helper for new diff markup
specs

- new specs for journals_controller#diff
- ported journal_formatter specs from old test repo
[OPF #539] fixes version roadmap progress bar
made versions partials readable
update rails, sprockets
remove old commentsin Gemfile
Merge pull request #126 from opf/feature/rails3_fix_version_progress_bar

fixes version progress bar
update ruby-openid
update dalli
update tinymce-rails
update strong_parameters
update guard
update pry
update sass
update uglifier
update README to include gemnasium
refactor wiki_page factory to get rid of a StaleObject error
moved versions controller test to specs

- added spec for opf # 528
[opf #528] fixes create version in issue#new view
[OPF #414] fixes issue description diff

- fixed journals_controller#diff
- adapt redmine diff helper for new diff markup