Merge pull request #1 from piskvorky/ziky90-develop

fix bugs in state reset and state init
implemented batch version - not tested
distributed ldamodel, cleaned code from old TODO comments and added log to see when is performed batch version queue merging. This version was tested both in terms of quality and time performance.
performance optimization
Revert "removed lda_dispatcher and lda_worker"

This reverts commit 0aa9b7921940e78729ccd172752ad9e9e024cdac.
refactored multicore LDA to inherit from LdaModel
added LDA multicore file import in __init__.py
cleaned added comments and several bug fixes
improve logging
improve logging & minor refactor