Translation

Add German and Russian
Modifications to Spanish
Between 8% and 33% for Dutch, Italian, Japanese, Romanian and Serbian

Credits:
French: AliceInGame with anonymous help
German: Three_Pounds & _Tsigje_
Russian: Jee_Host, transcengopher & politehnik
Spanish: SrNice & MiguelSnake & Mastropiero
Merge pull request #102 from aliceingame/master

Translation