Add cmake to the dependencies

We don't need to manually specify cmake in the build dependencies
when building KF5 packages anymore.

[rpm] Add cmake to the dependencies
Add URL field

[rpm] Add URL field
Compress sources with xz and improve setup

[rpm] Compress sources with xz and improve setup
Use kf5-rpm-macros

[rpm] Use kf5-rpm-macros
Update to latest git sources

[rpm] Bump version
[upstream] Update to latest git sources