Fiber-aware service implementation done.

 * unfortunately, it doesn't work with new dispatching system (1.0) yet.
Runtime mock class made for ease functional testing.
Application server mock redesigned.

 * explicit session specifying no longer required.
 * more convenient interface.
Dependency cleanup.
Synchrony tests added.
Tiny renaming.
Application mock server now runs via event loop in separate thread.

This is needed to perform synchronous operations without blocking program control.
Simple test for asynchronous service API added.
Workaroung RuntimeMock bug.
Specification added for pipe testing.
Tiny refactoring over RuntimeMock class.
We don't need to pass event loop to RuntimeMock actually.
Useless file exterminated.
Merge branch 'develop' of github.com:cocaine/cocaine-framework-python into develop
Examples synchronization.