Prepare to version 0.8.0. NOTE: In the future drop down support to py…

…thon < 3.4

Merge pull request #104 from PedalPi/issue-103-custom-change

Issue #103: Impl UpdatesObserver.on_custom_change

Version 0.7.1

Version 0.7.0

Version 0.6.0

Change version to alpha 1

Version 0.5.1

Fix readme for Pypi exhibition

Merge branch 'v0.4.0-test' into v0.4.0

Version v0.3.2 - Add folder pluginsmanager/util/builder in PIP