Removing legacy versions of Visual Studio 2010 and 2012
Merge branch 'master' of https://github.com/pioneerspacesim/pioneer into remove-vs2012

Conflicts:
	win32/vc2012/graphics/graphics.vcxproj
	win32/vc2012/graphics/graphics.vcxproj.filters
Merge pull request #2772 from fluffyfreak/remove-vs2012

DISCUSS - Removing Visual Studio 2010 and 2012