1. empty responses for valid http requests are now handled (forever re-try)
2. nicknames purification ('#' symbols elimination)
3. more error handlers in rating requests
4. more error handlers in parsers
users,posts,comments are preloaded from DB on start
deleted users handling minor fix
blocked access to user favourites is handled by [None]
sqlite error 'db locked' handled via eternal retrying
initial implementation of occur frequency amortization
1. greetings collection
2. config params
3. prettier stats
4. karma as user source
5. ... some other minor fixes