Fix words tacked on the end of a sentence.
Fix use of wrong macro.
Add first version of MRG for gpuarray (with tests).
Change GPUA_mrg over to use GpuKernelBase.  (I couldn't get it to work otherwise).
Remove useless import of NVCC_compiler
Add checks for copies and reassure observers that ga_int is 32 bits.
Merge pull request #1697 from abergeron/gpua_mrg

mrg_rng for gpuarray
Remove overflow and detect it if it happen again.
Don't read bad address. This fix a crash on some more strict driver/hardware.

Otherwise, it didn't cause other problems, as we reported the error to the user.

close gh-1814
Merge pull request #1817 from nouiz/crash

Remove overflow and detect it if it happen again.
Merge branch 'master' of https://github.com/Theano/Theano