Fix signed/unsigned warning error
SERVER-15767 Refuse to start up with invalid locally stored rs config
SERVER-15562 Estimate density before near search
SERVER-15771 Do not step down a remote primary unless you plan to replace it yourself.

Also, when stepping down for a higher priority node, set _electionSleepUntil,
not _stepDownUntil.  This way, lower priority nodes will still consider you
electable, and defer to you.
Revert "SERVER-15767 Refuse to start up with invalid locally stored rs config"

This reverts commit 33d59e5d8cded2e0eab2b9e370727eac5e4d020c.
SERVER-15710 Add better leak sanitizer integration
SERVER-15495 move query_stage_count to query_stage_count_scan
SERVER-15495 add tests for query_stage_count
SERVER-15847 Make sure producer thread wakes up and terminates when we're shutting down
SERVER-15694 unit test replSetUpdatePosition in the ReplicationCoordinator
SERVER-15565 Include memberID in log message
SERVER-15593 Initial autosplit heuristics are very aggressive when config servers are down
SERVER-15262 Map/reduce incremental collection code should be called without lock
Revert "SERVER-14674 Shard dies during chunk migration if running repairDatabase and Compact"

This reverts commit 0fde30ad2f873e7f835aa224e83a97ae6d4a171e.

Conflicts:
	src/mongo/s/d_migrate.cpp
SERVER-15659 make MockStage return actual mock stats
SERVER-15527 explain should report planner info and exec stats when query execution fails

This also changes the error behavior of explain so that the explain command succeeds as long
as it has provided valid output, even if the underlying operation failed.
SERVER-15855 update documentation about how packages are created

Closes #844

Signed-off-by: Benety Goh <benety@mongodb.com>
SERVER-15738 Check return value of syncApply and retry if needed
SERVER-15767 Refuse to start up with invalid locally stored rs config
SERVER-15831 top chunk auto split tests

Closes #845

Signed-off-by: Benety Goh <benety@mongodb.com>