Changed version from 1.0 to 0.2. Avoids future problems with parallel installations.

* Other projects have started using a 1.0 in library and .pc files but at the end you have to release 0.x releases as stable before a 1.0, they can't have parallel installations of 0.6 and 0.8 stable versions because they use the same 1.0 reference. This change avoids future problems in versioning and parallel installations.