xgamma-1.0.7-bp160.1.12

- Update to version 1.0.7
  * Update README for gitlab migration
  * Update configure.ac bug URL for gitlab migration
  * gitlab CI: add a basic build test
  * Resolve -Wdouble-promotion warnings from clang
  * Refactor to reduce code duplication
  * Use strtof() if available, instead of casting atof() to float
  * autogen.sh: use quoted string variables
  * autogen: add default patch prefix
  * autogen.sh: use exec instead of waiting for configure to finish

- modernize spec-file, move license to licensedir
- use gpg for source validation

-  Update to version 1.0.6:
  * This minor maintenance release provides the usual recent
    collection of build configuration improvements and janitorial
    cleanups. It does not provide enough gamma radiation to mutate
    the user into a green-skinned giant who likes to smash things. ;-)

- Update to version 1.0.5:
  + Document that xgamma is useless on XRandr screens.
  + Build system fixes.

- Split xgamma from xorg-x11. Initial version: 1.0.4.