Minor release for Yapsy 1.10.423

yapsyI've just released a minor version of Yapsy, a small python library for plugin management.

Not a big deal actually, just a few adjustments to take into account the feedback from developers of the Nikola project where yapsy is used as a support for the application's modular structure.

I also took from them the idea of registering yapsy to coveralls.io which motivated me to add some unit-test just to get the green badge reserved for a test coverage higher than 90%.