Rotest

* Fixed bug: services aren't released if no actual resources were requested as well
* Fixed bug: output handlers aren't started in the shell (start_test_run)
* Fixed bug: the resources release at a client's 'disconnect' didn't release all resources
* Updated doc to include shell_output_handlers and mention rotest-progress

Added 'shell_output_handlers' to rotest.yml - which lists the output handlers for running tests in shell

* Fixed bug: in python3 django uses __str__ instead of __unicode__ (and so you can't see resource names in links)
* Fixed bug: when locking two resources that are identical (OWNABLE=False) only one of them is released
The fix was done by changing client's "release_resources" method to *accept list instead of dict*

Minor fixes by integration with the websocket

* Removed 'session timeout' message and session cleaner from the server
* Used websocket to monitor the client's connection instead
* The usage of websocket (django channels) requires some stuff in the settings, so it's recommended to import its content into your project's settings file (from rotest.settings import *)
* Enabled sending resources and config to 'run_test' in rotest shell

* Support and add builds for django 1.8 to 1.11
* Changed windows build to run on django 1.11
* Dropped support for python 3.5