Here a complex update related to localization

Many strings couldn't have been localized in poEdit, because of xgettext misunderstanding of PHP multiline strings. Linebreaks converted \n and tabs to \t but it's wrong. 
So linebreaks have been replaced by the concatenation operator '.'.
Some strings were out of function of localization _(),_T(),_TP(). They were added and localized.
This commit contains full Russian translation.
Anyone can contribute in translation here https://www.transifex.com/projects/p/pommo-by-soonic/resource/pommopo/