Merge pull request #6 from Emergya/i18n-es

i18n: spanish translation
Update to Redmine v2.2.1
Remove dead code
Update licence copyright
Tradução para português
Merge pull request #10 from heslei/patch-1

Tradução para português (thanks to https://github.com/heslei)
Make compatible with redmine 2.3
Merge pull request #1 from octaviogl/master

Update for Redmine 2.3.0