libmateweather-1.6.1: Version bump + fix mkdirp patch

python/Makefile.am changed so update the mkdirp patch
mate-applets-1.6.1: Version bump + dep specific libmateweather

* Version bump to 1.6.1
* Now requires >=libmateather-1.6.1, update DEP accordingly.
Merge https://github.com/infirit/mate-overlay