Add add-app test to the functional test suite
Grammar nazi patching

 - syntax and typo errors fixed
 - some parts of code now looks simpler
Automatic detection synchronous functions in chains

 - now you don't need chain.synchronous decorator anymore. Chain class will do all work for you
 - some `todo`s fixed
Now cocaine-tool can restart application with and without specifying profile
Some sketches about yielding chains were added