some minor changes to ocl_azim_CSR
loss
added distortion CSR
fix a typo and added ocl_azim_csr_dis
added csr in ai and bench
complementary commit
complementary commit 2
foo
Merge remote branch 'giannis/master' into devel

Conflicts:
	benchmark/benchmark.py
	pyFAI-src/ocl_azim_lut.py
	setup.py
Revert some modification about layout (pep8)
Integrate splitBBoxCSR + test from Giannis
(nota: test not yet in global test suite)
include CSR tests on GPU vs ref & cython based
rename file
benchmark changes its scale with new/faster algo
remove former tests
dont use logger in  benchmark
catch issues with low memory devices in tests