fixes #3253 Installer artwork broken on Yosemite
Preparations for getting rid of btree_erase_range_generic. Added erase option to apply_keyvalue_change. Got rid of some unused code. Added TODO!s
Finished rewriting erase_range, refactored it into a different file, added missing includes.
Merge branch 'next' into daniel_2034
Fixed a bug in the changed erase_range (released the superblock to early)
deleting the commented out section to close out #1524 serial_mix memcached workload fails because append/prepend is broken

over-the-shoulder review by @danielmewes
Use btree_key_cmp() where possible
Added a comment
Port of Michel's fix for #3005 to `next`. Code review 2153.
Merge branch 'daniel_2034' into next
minor fix for test cleanup phase

over-the-shoulder by @vexocide
server_config_client server/peer maps no longer include proxy peers - this breaks stats
changing stats requests to get the server id in the response
fixing crash when reading the _debug_stats table from a client not on thread 0
Fix for #3449
Regression test for #3449
Fix comparison operators for leaf node reverse_iterator, Closes #3446.
Merge branch 'v1.15.x' into next
Merge branch 'next' of github.com:rethinkdb/rethinkdb into next
Allows `"query"` jobs to be interrupted by deleting them from the `rethinkdb.jobs` table