Glm 0.9.5 [WIP]

This is my shot a #468;
There  are still a couple of warning because glm is deprectating the use of degrees instead of radians and 'make distcheck' fails (see http://www.libavg.de:8010/builders/x64-lnx-incr/builds/2308)

I use PR like this to have a clear channel of communication over the changes, once I consider it done, I'll remove [WIP] from the title and post a comment that it's ready to merge.

If you wan't to work on this, feel free to check out the branch
``` git checkout -t origin/glm-0.9.5 ```
and don't forget to push early and often.