We didn't check whether or not Lua bindings executed correctly,
so we didn't pay attention to these problems:

luaL_Buffer was misused, and when configuration
would exceed 4K allocated on stack, this led
to lost pieces of Lua script prepared by
tarantool_lua_load_cfg().

box.on_reload_configuration() did not work correctly with
disabled spaces.

Fix the above mentioned issued and add a test.

Implement blueprint 'add-delete-fields':
https://blueprints.launchpad.net/tarantool/+spec/add-and-delete-fields-in-tuple

Make it possible to add new fields with UPDATE, and
delete existing fields.

Rewrite the UPDATE algorithm to pre-compute new tuple
length and do most of the work in place, without
allocating temporary buffer for fields.

Add Connector/C support for new UPDATE options.

Add and update tests.

Joint effort by Konstantin Shulgin (initial implementation),
Dmitry Simonenko (Connector/C) and
Konstantin Osipov (spec/code review).

absolute values.

installation pathes.

Flushing stream after write request was added.

Establish connection routine was updated: now socket uses TCP_NODELAY
option.

Clarify comment in index_count() function.

- Add space_n() and index_n() utility functions.
- Add index_is_primary() utility function.
- Rework index initialization and iteration sequences.
- Coding style fixes here and there.