1.2.0 (#2)
* Refactor get_devices method for total HomeSeer device support
The get_devices method no longer returns device objects based on device_type_string, but instead based on the Control Pairs detected for the device. This change makes libhomeseer completely agnostic as to the technology or plug-in that provides the device. All HomeSeer devices are now supported and libhomeseer will return at least a status-only object for every device. Devices with Control Pairs that fall into certain categories (initially On/Off, On/Off/Dim, and Lock/Unlock) will have an object returned with appropriate methods (e.g. on(), off(), dim(), lock(), unlock()) that match the device's detected Control Pairs.
* Update documentation in example.py
* Bump version to 1.2.0
* Improve release script
