Removed glutapplication class and references

[Bluer01]

This refers to issue #148 and removes both the header and source file for glutapplication and also removes any mention found of glutapplication from other files.

[coveralls]

Coverage remained the same at 77.627% when pulling 0a07617 on Bluer01:master into 6d9a9e9 on mosra:master.

[mosra]

GlutApplication is deprecated since d70f75a, removal is the next step, scheduled in roughly ~6 months from now.

[mosra]

After a period of deprecation, finally dropped in 035f644. And, even though two years later, you get a credit for it, @Bluer01 :)