Elliptics 26 backends support
Configurable cocaine application name
Misprints fixed
Do not update statistics of disabled node backends
Fixes for mastermind client
Cache item class uses SecondaryIndex
Fix for applying smoother plan simultaneously from several workers
Merge branch 'master' into elliptics26

Conflicts:
	src/cocaine-app/jobs.py
	src/cocaine-app/smoother.py
Commands for enabling and disabling node backends
Fix for changed monitor_stat API
Fix for node move
Changelog, version 2.9.0
Optional app name for mastermind util
Changelog, version 2.9.1
Fix for deployment script
Changelog, version 2.9.2
Fix for mixing old and new history
Changelog, version 2.9.3
Cache handlers turned back on
Using only necessary monitor stat categories