maintenance release fixing some bugs

release Paparazzi 4.0 stable version

tagging as unstable to get a proper paparazzi_version

release candidate 2

release candidate 1

Preparation for 4.0 release

This tag just marks the old (somewhat) stable master before we switch…

…ed to the new branching model.

Now master is the development branch.
Please refer to http://paparazzi.enac.fr/wiki/RepositoryStructure for the new branching model.

This is the last version/commit that still has some negative control gains, etc...