Fix problem when using MERGE and indexes exist
Merge pull request #1465 from systay/merge-with-index

Fix problem when using MERGE and indexes exist
Proper cleanup on failed transaction commit in MasterImpl, added more logging.
Debug logging for channel.acquire in Client.java
Cypher null docs: fixing one doc bug and AsciiDoc table syntax.
subtree merged neo4j-browser project into community/browser, then integrated into maven build
moved browser module to part of neo-full-build profile because of extra toolchain requirements
Wire browser into Maven project dependencies.