xgamma 1.0.7

Alan Coopersmith (8):

• Update README for gitlab migration
• Update configure.ac bug URL for gitlab migration
• gitlab CI: add a basic build test
• Build xz tarballs instead of bzip2
• Resolve -Wdouble-promotion warnings from clang
• Refactor to reduce code duplication
• Use strtof() if available, instead of casting atof() to float
• xgamma 1.0.7

Emil Velikov (1):

• autogen.sh: use quoted string variables

Mihail Konev (1):

• autogen: add default patch prefix

Peter Hutterer (1):

• autogen.sh: use exec instead of waiting for configure to finish