Renaming.

* `FutureMock` is now called `PreparedFuture`
* `FutureCallableMock` is now called `Deferred`
Code remarking

* todo comments added
Service refactoring.

* functional decomposition over connect methods
* services has obtained ability to connect through locator injected
* renaming done
Cocaine-tools: refactoring.

* node info, app check and app restart actions now takes locator object instead of locator host and port
Bugfix and refactoring

* fix multiple locator connections in cocaine-tools
* renaming done
Merge branch 'master' of github.com:cocaine/cocaine-framework-python
ColoredFormatter introduced

* it's useful for colored log output in tools
Logging revamped
Interactive log handler introduced.

 * now it's not problem to implement interactive tools
 * in interactive mode log record ending with '... ' is treated as no newline record
Some documentation added
Errors is no longer eaten by event loop.
Error handling and logging improved.

* now worker has ability to log errors with traceback when non caught exception occurs
* `FutureResult` objects will try to save traceback when exceptions is stored in it
* exception traceback will be written to the log if nobody caught it in the last chain item
Setup script corrected

* tests requirements moved to the special section
Headers property for http decorator.
Http example added.

* QR code generator. Sample request: http://localhost:8080/qr/generate/?message=42
Move cocaine-tornado-proxy here
Debianization for cocaine-tornado-proxy
Style.
Cocaine-tool serve skeleton.
CocaineProxy is now part of the framework.

* proxy is now placed in class, because there should be some way to configure it by arguments (not only through command line arguments)
* cocaine-tool serve start now properly works as intended
* easy PEP-8 refactoring done