Fix possible NPE
Merge remote-tracking branch 'origin/develop' into develop
Issue #2276. OChainedIndexProxy: Improve non composite index usage.
Issue #2276. OChainedIndexProxy: Allow to use non composite hash index.
Issue #2276. SQL Select. Search for indexes. remove code duplication.
Minor: refactoring
Minor: refactoring
Issue #2276. SQL Select. Refactoring of: Index existence
Issue #2276. SQL Select. Search for indexes. remove code duplication.
Minor: refactoring
First step to get working sharing on query. Simplified also the internal management of distributed cfg
Issue #2276. OChainedIndexProxy: Improve non composite index usage.
Issue #2276. OChainedIndexProxy: Improve non composite index usage.
Merge branch 'develop' into orientdb-2276
Issue #2179 was fixed.
Distributed: simplified configuration removing replication flag, now understood from servers array.
Call to Collections#emptyIterator() was replaced by OEmptyIterator.
Merge branch 'develop' of https://github.com/orientechnologies/orientdb into develop
Fixed issue on SQL UPDATE and put of map/collections

Reported on:
http://stackoverflow.com/questions/23373928/how-to-put-a-list-or-map-val
ue-into-an-embedded-map-using-sql-update
Merge remote-tracking branch 'origin/develop' into develop