The main change in this release is support for the Wemo device rules database, including the ability to fetch, update and store rules in a device.
It also contains support to allow pywemo to act as an endpoint for a Wemo rules action. Together these changes provide support for the Wemo Switch Long Press.
There are also a number of other updates modernising the infrastructure used for parsing XML from Wemo devices, as well as significant improvements in tests, particularly the use of vcr to record the responses of real wemo devices - which should make future changes easier to test.
Many thanks to esev and Spectre5 for the huge efforts they have put into this release.
Given the level of change I thought it merited a major version change - although I believe it should still be compatible with 0.5.6