remove  translations for unsupported languages

At the moment we are a relatively small community. We don't speak most
languages, which where supported previously. This resulted in a lot of
differences in quality and quantity of our translations.

We happily add languages again, if we find a maintainer for that
language.
Merge branch 'feature/rails3' into feature/rails3_drop_translations_we_cannot_support_at_the_moment
fixes failing cuces
whitespace fixes for issues edit partials
added cukes for issue#new and issue#edit

- checking for attributes which are overridden by childs
- new step to find disabled elements
shortened condition in issues helper
fixed typo in issue new cuke
fixin' failing tests related to languages dropped
Merge branch 'feature/rails3' into feature/rails3_drop_translations_we_cannot_support_at_the_moment
Fix XSS in select2 fields

Use select2's escapeMarkup function for our own formatter implementation.
Fixed breadcrump of timeentries reports_controller
Merge pull request #194 from opf/feature/rails3_fix_timelog_breadcrumb

Fixed breadcrump of timeentries reports_controller
Merge pull request #190 from opf/feature/rails3_drop_translations_we_cannot_support_at_the_moment

Feature/rails3 drop translations we cannot support at the moment
Fix XSS in timelines select2 fields
fixed some typos for disabled issue attributes
Merge pull request #193 from opf/feature/rails3_fix_select2_xss

Fix XSS in select2 fields
Merge pull request #189 from opf/feature/rails3_fix_disabled_fields_on_issue_new

Feature/rails3 fix disabled fields on issue new
udpated OpenProject special version

to pre4
Merge remote branch opf/feature/rails3 into feature/api-refactoring