Update gemini tests

Tests have been broken since #975, this commit fixes it.
Update checkbox screenshot

Was not updated after d5f38a168af20e9fbeb822c7a476439e42068f46
Update radio-group screenshots
Merge pull request #995 from bem/fix/checkobx-gemini

Update outdated gemini tests
fixes after review
Merge pull request #996 from bem/blocks-doc-fix

fixes after review
Optimize pictures in gemini/screens
update
Run linters in specs task in Travis (closes #980)
Merge pull request #1000 from bem/issues/947@v2

update
(radio|checkbox)-group_theme_simple: Make styles for button_togglable_radio
Merge pull request #998 from bem/issues/997@v2

(radio|checkbox)-group_theme_simple: Make styles for button_togglable_radio
Merge pull request #999 from bem/issues/980@v2

Run linters in specs task in Travis (closes #980)
Update Russian readme and add English translation
Merge pull request #1001 from bem/issues/942@v2

Update Russian readme and add English translation
Old screens were incorrect
Merge pull request #1002 from bem/menu-new-gemini-screens

Old screens were incorrect
control-group : Динамическое добавление контролов
Merge pull request #1003 from bem/gela-d/issues/957@v2

control-group : Динамическое добавление контролов
popup: split own functionality into target modifiers (close #968)