Compatibility with Docker Isolation Plugin

* An isolation plugin provides stdout file descriptor through handle_t.
* Cocaine provides to an application full locator's endpoint through --locator argument.
Development version bump.
Merge branch 'andrusha97-master'
Docker support, part one.
Channel is movable now

g++ 4.4 doesn't define default move assignment operator, so i've defined it explictly.
Docker support, part two.
Merge branch 'andrusha97-master'
Changelog update.