minor JSHint warning fix
Update README.ru.md (close #91)

стилизация русского языка, улучшение языковых конструкций, правка ошибок
move or just leave transform attr from Group to the inner Path Elems (close #86)
plugins/cleanupEnableBackground doesn't catch floating-point numbers (fix #89)
plugins/removeViewBox doesn't catch floating-point numbers (fix #88)
plugins/cleanupNumericValues: wrong floating-point numbers regexp (fix #92)
SVG file generated by http://fontcustom.com not properly compressed (fix #90)
v0.2.1