ru translation courtesy of Liudmila Tesson

now, refactor...
mapfishapp ru translation, part 4
Update ru.js
Update ru.js

checked syntax with jshint. sadly jshint can't check russian grammar.
Update ru.js

fix : variable name in russian
missing spaces thanks fvdb
missing space
Merge pull request #338 from georchestra/i18n_ru

viewer russian translation courtesy of Liudmila Tesson