Synchronize Observer on OperationMerge#201

Merged

benjchristensen merged 3 commits intoReactiveX:masterfrom benjchristensen:issue-200-merge-synchronization

Apr 2, 2013

+95-3

Commits on Mar 19, 2013

Synchronize Observer on OperationMerge
benjchristensen
committed

Commits on Mar 20, 2013

Synchronization of Merge operator (fixes)
benjchristensen
committed

Commits on Apr 2, 2013

Trying to fix non-deterministic test
benjchristensen
committed