unit tests passing with offheap-indexing
Merge branch 'master' into offheap-incremental-index
close IncrementalIndex properly and free up buffer
configure buffer sizes
Merge branch 'master' into offheap-incremental-index

Conflicts:
	processing/src/main/java/io/druid/query/GroupByParallelQueryRunner.java

processing/src/main/java/io/druid/query/groupby/GroupByQueryRunnerFactor
y.java

processing/src/main/java/io/druid/segment/incremental/IncrementalIndexSt
orageAdapter.java
fix race while index closing and querying
Merge branch 'master' into offheap-incremental-index
fix compilation
remove unnecessary changes & fix index closing subquery
Merge branch 'master' into offheap-incremental-index

Conflicts:
	processing/src/main/java/io/druid/query/groupby/GroupByQueryHelper.java

processing/src/main/java/io/druid/query/groupby/GroupByQueryQueryToolChe
st.java

processing/src/main/java/io/druid/segment/incremental/IncrementalIndex.j
ava
Sync changes from branch new-ingestion PR #599

Sync and Resolve Conflicts
merge changes from druid-0.7.x
fix compilation
review comment - move index closure to finally
merge changes from druid-0.7.x
fix NPE while indexing
some better null handling for MV
fix all manners of brokenness from nulls and empty strings
fix compilation with Java 8
Merge branch 'druid-0.7.x' into offheap-incremental-index