component/ocropy Add the ocropy library for OCR
This commit add component needed for Optical Character recognition: ocropy and its dependancies The Ocropy egg on Pypi is empty, so this component have to be built from source. The default neural network model is downloaded from the author website and installed in python2.7/share/ocropus. The patch is here for to different thing: one is adding an OCROPY_MODEL_PATH to be able to specify the position of models, the other is importing for the first time a module that compile C code from python, allowing us to have the static library built before runtime and preventing us from using gcc through zope. More models are available here: https://github.com/tmbdev/ocropy/wiki/Models
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