Merge pull request #73 from flexiondotorg/master

Fixed libgl
Merge pull request #74 from flexiondotorg/master

Move some package into a not-ready group.
Merge pull request #75 from flexiondotorg/master

Bump the pkgrel.
Merge pull request #76 from flexiondotorg/master

Remove `mate-common` and `mate-doc-utils` from the `mate` group.
Fix conflict with the filesystem package.