update nl locale and regenerate locales for de, es and fr

cs and he cannot be regenerated because some or all characters are not imported by Tolk
update cs and he locales too

tolk:import did not work correctly because my tolk tables in mysql were in latin1, not in utf-8
after changing my tables and columns to utf-8 I was able to import he and cs locale correctly 
and regenerate
fix #1429 by correctly handling tags with dots

This was a very old regression. This used to work before the rails 3.2 upgrade... Added tests
to prevent future unnoticed breakage
fix manual merge error
fix #1417. We now handle unblocking a todo that is part of a hidden project or context
Update es.yml

manually merged with 2.3devel
fix #1419 for master too: do not show new todo that was added with show_from set
fix #1422. Changing default tags of a project is now remembered
when not updating the whole page
merge i18n keys to better support fr locale and update en, fr and nl locale for the change

es was updated by tolk, but no changes in content
Add login backdoor to speed up the cucumber test suite
add new rvm dotfiles to gitignore
fix #1273. Used the wording suggested in this ticket.
Merge pull request #183 from mattr-/cucumber-login-backdoor

Add login backdoor to speed up the cucumber test suite
Move the expire_session route

It's now in the cucumber login helper.
Merge pull request #184 from mattr-/cucumber-login-backdoor

Move the expire_session route
update gems
Project and context view can now be grouped by context and project (using view menu)
fix expiration test. it was missing a rendering
fix failing tests
move the two toggle links in top-right to view menu