Revert "Prepare for versioning - calling it 0.9.0 for now"

Let's keep things simple and follow the framework version
in this "reference" client.

This reverts commit 6a82bc70b93d2909d802801991403072b0255619.

Conflicts:
	src/application.cpp
Update libcommuni to v2.2.0
Switch back to HSL-based nick colors