Import/export test was fixed.
Changed version of "develop" branch to 1.6.0-SNAPSHOT
Fixed issues on management of iterators and collections as result set. SQL Union now is lighter and accepts dupicates (use set() to remove them)
Fixed update bug in hash indexes.
Merge remote-tracking branch 'origin/develop' into develop
Fixed issue on SQL expand() without any target
Transactions now cache reads too. This prevent to have multiple instances inside the same tx of read records
Merge remote-tracking branch 'nuvolabase/develop' into commit-fixes