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
Add Threefry random generator from Random123.
Merge branch 'master' of https://github.com/ddemidov/vexcl
Merge remote-tracking branch 'neapel/master'
doc update
doc update
doc update
Moved mpi.hpp to top level, touched docs
Quiet FindCUDA
Copy from/to pointer.
Use random generator for seed.
Mentioned random number generation in README
typo
Merge remote-tracking branch 'neapel/master'
Allow arbitrary expressions as FFT input.
Return an expression as output.
(This works because the FFT keeps its own vectors)
When generating one float only use 32 random bits.
Tried to convert uint64 to uint32, generated wrong CL code
Use fully qualified names in function and stencil definition macros

fixes #22