stored-procedures.xml, box.digest, stable
Merge branch 'stable' of https://github.com/tarantool/tarantool into stable
changes in 1.5 due to issue #157 'box.ipc functional syntax doesn't work'
Merge branch 'stable' of https://github.com/tarantool/tarantool into stable
Merge branch 'stable' of https://github.com/tarantool/tarantool into stable
logger_level change
Merge branch 'stable' of https://github.com/tarantool/tarantool into stable
Merge branch 'stable' of https://github.com/tarantool/tarantool into stable
connectors.xml mention txtarantool
Increase process title buffer to 256 bytes (upon a request from oloremo)
A fix for gh-614: provide keepalive options on Linux

Provide fine-grained keepalive options on Linux, which
supports per-socket defaults.

Fix a bug with trying to set keepalive options for UDP
sockets - don't try to do it.
Merge remote-tracking branch 'origin/stable'

Conflicts:
	doc/user/connectors.xml
	doc/user/stored-procedures.xml
	doc/user/tutorial.xml
	src/coio.cc
	src/evio.cc
	src/evio.h
Fixes gh-645
Fixes gh-636 - Flush schema on demand
Code review fixes