M3-cli

* Added new commands:
GET_TOTAL_BILLING_REPORT,
GET_SUBTOTAL_BILLING_REPORT,
GET_HOURLY_BILLING_REPORT,
GET_RESOURCE_BILLING_REPORT,
GET_MULTIPROJECT_BILLING_REPORT
* Added new parameter type 'bool'

* Added new commands;
* Add showing request/response in debug mode (passwords are masked)

* Added plugin mechanism;
* Removed old bugs, added new;
* Improved README.md;

* Improved README.md;
* Fixed data converting to use it in requests to the server;
* Fixed trouble with os.get_terminal_size().columns method;
* Added packing `params_set.ini` and `commands_def.json` to the M3CLI distribution zip file.

* Added commands: create schedule, delete schedule, delete tag;
* Added possibility to wrap the parameters in the request;
* Small bug fixes and improvements.

* Small bug fixes and improvements:

Added
* Domain parameters (inheritance for the parameters)
* Command help showing on the errors;
* Logs only by ``--debug`` flag;
* Storing commands help strings into ``commands_help.py``;
* Possibility to show detailed server response with ``--json`` flag.