* Move search form to the left
* Pin left bar (add jquery.pin plugin)
* Move all configuration fields to confval directive
* Move builddirs to separate directories, so less rebuilds.
* Some minor fixes

Conflicts:
	src/box/sophia_engine.h

Fixes gh-778: fiber.id() throws an error for a dead fiber.

Always return fiber id, even for a dead fiber.
Add a test case.

* transaction is yet active on CALL return
* transaction conflicts on commit

Conflicts:
	src/box/replication.cc

closes gh-771

Conflicts:
	doc/user/configuration-reference.xml
	doc/user/connectors.xml

Conflicts:
	doc/sphinx/book/connectors/index.rst

Mostly remove obsolete statements. Document slab_alloc_maximal.

~/.config/tarantool superseeds /etc/default, not augments it