add basic implementation of sreality scraper (without saving)
cleanup
add couchdb implementation from @korczis
Merge branch 'master' into sreality-scraper

Conflicts:
	app.js
MemoryQueue TODOs
Base class for Queue implementation
Custom error - NotImplemented
Subclass of QueueBase now
Better comments
wasAlreadyEnqueued + enqueuUrl takes object instead of url, processor name and optional data
Added exist() placeholder + put() parameters swapped
Merge commit 'ecc6f624d639e1bb18214760c3a756990f729326' into sreality-scraper
New implementation of QueueMemory, old wrappers kept for later elimination
Merge pull request #3 from korczis/queues

New implementation of QueueMemory, old wrappers kept for later eliminati...
Consistent params with QueueMemory
Move higher functions from queue to engine to keep queue as abstract as possible
Ignore *.log files
Using winston logger
Cleaner output ...
Cosmetics