KATTA-214 secondary hit sort consistent with lucene and shard name tertiary sort
KATTA-209 use ConcurrentHashMap in _indexToShards map
KATTA-215 add secondary ordering to field sort
add IDEA project files to gitignore
Merge branch 'KATTA-214'
Merge branch 'KATTA-215'
Merge branch 'KATTA-209'