mate-file-manager-1.6.1-r1: Fix segfault + add small fix

The prefferences from within caja was broken
Also add small fix suggested by upstream on irc
Merge https://github.com/Sabayon/mate-overlay

Conflicts:
	mate-base/mate-file-manager/Manifest
	mate-base/mate-file-manager/mate-file-manager-1.6.1-r1.ebuild
Clean mate 1.5 development

Remove all 1.5 development ebuilds
Remove development packages from pacvkage.mask
fix merge coflict
Merge pull request #39 from infirit/master

Clean out mate 1.5 ebuilds