[matter] add support for --sync-best-effort
[matter] add exception handler that also prints local variables in the stack
[matter] rename matter.py to matter_app.py to avoid name clashing
[matter.utils] avoid circular module dependency with matter.output
[matter] allow local, in-git execution for debugging purposes
[matter.builder] correctly handle Portage package uninstalls

Package uninstalls were accounted as built packages, fooling the
entropysrv plugin.
[todo] update TODO
Release Entropy 165
Tagging Entropy version 165
Merge remote-tracking branch 'upstream/master'