Merge remote-tracking branch 'neapel/master'
documentation fixes
Fixed OpenMP check in CMakeLists.txt
Got rid of unused variables warnings
Fixed ViennaCL examples
Referenced arch pkgbuild in INSTALL

Thanks, @raedwulf!
Merge remote-tracking branch 'neapel/master'

Conflicts:
	vexcl/random.hpp
Add cmake script for finding VexCL.
Move the FindVexCL cmake script into its own directory
Add installation commands for FindVexCL cmake script
Merge pull request #20 from raedwulf/cmake

FindVexCL.cmake script
Merge branch 'master' of https://github.com/ddemidov/vexcl
Copy from/to pointer.
Use random seed