Bump version to 2.2.0

Version update is needed before
increasing required weston version,
so that users do not have to use
latest weston version.

In this development cycle:
- Fixed many compiler warnings
- Fixed source code analyzer findings
- Now ilmInput is not optional
- Fixed some issues in ivi-input-controller

Signed-off-by: Emre Ucan eucan@de.adit-jv.com