1.7.3 version was created.
Fixed issue #2335
Fixed issue #2341
Fixed issue #2299
Fixed issue #2299
Fixed issue #2299
Set of unload status was removed from deserialization of OrientElement.
Merge remote-tracking branch 'origin/1.7.3' into 1.7.3

Conflicts:
	graphdb/src/main/java/com/tinkerpop/blueprints/impls/orient/OrientElement.java
Issue #1957 was fixed.
Issue #1957 was fixed.
Issue #2400 was partially fixed (without tests).
Issue #2400 was fixed.
Documentation and refactoring
Merge remote-tracking branch 'origin/1.7.3' into 1.7.3
Issue #2453 was fixed.
Merge remote-tracking branch 'origin/1.7.3' into 1.7.3
Risky non wal-tx mode was implemented.
Fixed issue #2449
Merge remote-tracking branch 'origin/1.7.3' into 1.7.3
Fixed clustered node startup problem

Fixed problem when requests are sent to a node coming up while
synchronizing the DB, the requests don't go through the logic to wait
until the node is online if the request requires it.