German translation

Partly translate some parts of the game
Save latest level played to local storage. Change play link when latest level is available on home page.
Update de.coffee - Space fix
Merge branch 'master' of https://github.com/faabsen/codecombat
Added some missing words to the translation lists. Important for pull request #248
Merge https://github.com/codecombat/codecombat
Merge branch 'feature/play-button' of https://github.com/dristic/codecombat into test
Added the else statement. This can be used to make pull request #253 more advanced.
Added/shuffled (missing) words in locale files.
Translated some more words in Dutch and also translated the newly added/shuffled words.
Added missing i18n tags for issue #198 (now resolved) in all locale files.
Resolved issue #149
Starting work on time-travel debugging interface.
Tracked down common used i18n tags and applied it already on the nl.coffee file
Found more duplicate i18n tags and applied it both to the ar.coffee and nl.coffee file
More progress on debugger.
fix i18n tag in editor and setting template
french grammar and orthograph fix.
Found more tags. ar, bg and nl should have now the correct versions with the (re)moved i18n tags.
Merge branch 'translation_fr2' of https://github.com/MartinDelille/codecombat