make relabel cython optionnal
factorizing code from cython histogram with numpy
Merge remote-tracking branch 'origin/master' into devel
Merge remote branch 'origin/devel' into HEAD
debugging tool for mac computers...
Merge remote-tracking branch 'origin' into devel
add option to avoid re-cythonization ...
there was a bug in cython generatd code with version 0.20 beta
Merge remote-tracking branch 'origin/devel' into devel
Merge remote branch 'origin/devel' into HEAD
Test case for Issue #88
improvement of the tracer (log into a file)
fix issue #88
again fix Issue #88
Update doc prior to release v0.9.2
cythonization option ...
Update documentation
directory creation was not at the right place