instance_pool errros fixed
bq_cond_send changed to multicast
instance_heap bugfix
Header added; fallback to one bq_cond
tabs cleanup
new fancy synchronization logic from blocking_queue_t (not tested though)
Merge pull request #2 from discobot/master

Добавил pd/lightning/instance_pool
Merge branch 'ring-handler' of https://github.com/skywalker239/lightning into ring-handler
Merge branch 'ring-handler' of https://github.com/skywalker239/lightning into ring-handler
Merge branch 'ring-handler' of https://github.com/skywalker239/lightning into ring-handler
Merge branch 'ring-handler' of https://github.com/skywalker239/lightning into ring-handler
Merge branch 'master' of https://github.com/skywalker239/lightning

Conflicts:
	pd/lightning/instance_pool.H
Merge branch 'master' of https://github.com/skywalker239/lightning into instance_pool
Merge branch 'master' of https://github.com/skywalker239/lightning into instance_pool
Refactor acceptor_instance_t.

Change functions for pibf-s manipulations.

Implemented phase2 executor.
Tests for acceptor_instance_t.

Code building pibfs.

Changes in phase2_executor.
new proposer_pool implemented; not tested
new proposer_pool implemented; not tested
proposer_pool activation synchronization implemented
proposer_pool activation synchronization implemented