updated abstractBatcher to avoid potential ConcurrentModificationException with smaller batch sizes under load. Closes #157
switch to using putIfAbsent semantics. USERGRID-1753
latest round of changes - much more simplified API addressing USERGRID-1753
Merge branch 'master' into USERGRID-1753
moved to using volatile, works on all test boundaries
adjustment for testing values of serial counter submission
added wait on serial submit
Merge pull request #183 from apigee/USERGRID-1753

Usergrid 1753
Poke to fix slf4j-api missing from compile dependencies.
Merge branch 'master' of github.com:apigee/usergrid-stack
Created test to prove issue.

USERGRID-1906
Fixes issue

USERGRID-1906
Added a test for USERGRID-1919.
Fixed issue with email identifier edge case.

USERGRID-1906
Reverted changes to Query.  The functionality cannot be split due to legacy mapping.

USERGRID-1906
Merge pull request #185 from apigee/USERGRID-1906

Usergrid 1906
Merge branch 'master' into USERGRID-1919_TEST
Removed unused code in test.

USERGRID-1919
Merge pull request #186 from apigee/USERGRID-1919_TEST

Usergrid 1919 test
Merge branch 'master' into USERGRID-1768