operations/distance-transform: new operation for distance transforms
Updated POTFILES.in
operations/distance-transform: switch to LGPLv3+ license
doap: add <programming-language>
tests: Add initial unit tests for GeglColor
Update gegl.doap and AUTHORS

Make gegl.doap compliant to the new DOAP file style (GUADEC 2014):
* Add new mandatory fields 'description' and 'programming-language'.

Add bug tracker URL.
Update mailing list adress.
Remove trailing white spaces.
Add me to AUTHORS.
(cherry picked from commit 279b33eddb37c8d832b85252ec87e8920f26f852)
Remove extra programming languages from the doap file.
gegl-color: Add documentation about format of accepted strings
tests: Add unit tests for GeglColor parsing

Currently failing as named and RGB hex does not interpret values as gamma-corrected.
gegl-color: Take gamma-corrected colors when on #rrggbb format and for named colors

This changes the semantics to be line with the expected for CSS/HTML values.
Because the format can only have 256 values per channel, gamma-corrected
is also the only thing which gives sufficient perceptual precision.
Makes previously added unit tests pass.

Warn: changes output of operations using this type of format strings!