Merge pull request #43 from urbanairship/double_op

adding double op
Merge pull request #44 from urbanairship/double_op

repainted green
copy the cas fix to master the low-tech way.
Support multiGet
Merge branch 'multi-get' into yammer-backport

Conflicts:
	src/main/java/com/urbanairship/datacube/dbharnesses/HBaseDbHarness.java