v0.2.0

[BUGFIX] Validates screenName length
[BUGFIX] Validates username
[BUGFIX] Shows current user like in the first position
[BUGFIX] Indexes email on user create
[BUGFIX] Fixes a defect when admin could not manage groups
[BUGFIX] Does not take out post that has been published to group(s) only
[BUGFIX] Properly sorts likes in My Discussions
[BUGFIX] Does not copy post to Posts timeline on owner's like/comment
[BUGFIX] Reconnects connection to Redis after an exception
[BUGFIX] Does not send to clients events about hidden posts
[BUGFIX] Updates group last activity on comment or like
[FEATURE] Shows 30 posts per page
[FEATURE] Serialises group subscriptions
[FEATURE] Adds Profiler class
[FEATURE] Does not bump posts on a new like
[FEATURE] Adds timestamp to logger
[FEATURE] Adds default error level to config