add gem vkontakte_api
add to class String method strict_tags
add vkontakte_helper with method repost_on_group_wall
call repost_on_group_wall when create or update enabled post
Merge branch 'dev' into IS_VALID_13_repost_on_VK_group_wall
add vk_repost settings in admin panel
modify config/application.yml.example with vk data
fix alert message
Merge pull request #16 from SBS-team/IS_VALID_13_repost_on_VK_group_wall

Is valid 13 repost on vk group wall