[supervision/transgen] Add MASTER_REPOSITORY, fix checkout target

For the checkout target, one must use the bootstrap script bundled with the
sources.
[mk/platform] Add support for LinuxMint

For now, just declare LinuxMint as a Debian derivative. This fixes a number of
issues with Debian multi-arch paths (esp. with SYSLIBDIR).

Thanks to Gregoire Milliez for the feedback & testing.
[devel/libedit] Update to 20140620-3.1

Changes since 20110227-3.0 are difficult to extract from cvs and concern bug
fixes only.

At least, this fixes an issue with long strings in history, reported by Mamoun
Gharbi. Thanks!
[simulation/morse] Upgrade to 1.2.1

It is a maintenance release, fixing several issues found in 1.2:

- mark Morse ready for blender 2.70 and 2.71
- fix interaction between modifiers and datastream handling readers
  (#544)
- fix camera handling for grouped objects (#509). Only works for
blender > 2.65
- fix handling of multiples ptu in a scene (#536)
- fix several issues with multinodes (#526)
- fix waypoint actuator when freeZ is specified
- fix compound sensor
- export properly the simulated time for ROS

The two patches are integrated in the mainstream package
[middleware/orocos-rtt] Fix the detection of xpath syntax call

From mainstream, commit 7d90fa97d
Fix build on Fedora 20
Bump PKGREVISION