strings for version 12.0 (111)

Fixed some errors in translation  
Added the new translation for the new features  
Added some missing translations  
Changed 'Microblogging system' by 'Social network' (cause Pump is not a microbloggin system'  

For the next version I'll adapt the User Manual too.
Merge pull request #132 from moshpirit/patch-5

strings for version 12.0 (111)