some work on wavelength calibration ...
some more work on ID11... almost working
correct flatfield from dark current ?
Merge remote branch 'origin/master' into HEAD
some work on casting in OpenCL (int32 -> float32)
Merge branch 'ref_lambda', remote branch 'origin'

Conflicts:
	openCL/ocl_azim_LUT.cl
	pyFAI-src/ocl_azim_lut.py
fix a bug in the peak-picker