This reverts commit 8dc70aac.

- INSERT AFTER operation was deleted;
- INSERT BEFORE was renamed to INSERT;
- Tarantool connector/c was updated;
- Tests was updated.

64-bit arithmetic and logical operations was added:
  - 32-bit fields can use 32-bit operands;
  - 64-bit fields can use 32-bit and 64-bit operands.

[connector][perl] AnyEvent support. Continuation support. Limit = max_sint32 by default. primary_key_index option.

New UPDATE list operations were added: INSERT_BEFORE and INSERT_AFTER.

url:
https://blueprints.launchpad.net/tarantool/+spec/allow-inset-fields

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.

Remove connector/python and connector/ruby since
these drivers are hosted separately now.
https://github.com/mailru/tarantool-python
https://github.com/mailru/tarantool-ruby

CMAKE_LOCALSTATE_DIR options added. Configuration file search path is changed to
${CMAKE_SYSCONF_DIR}/tarantool.cfg.

The run test script was updated.

Delete and update_fields methods was fixed. Tests was updated.