ltrain/lpred: Using CSLTM backend

[kba]

Since the clstm SWIG bindings aren't up-to-date (but see tmbdev/clstm#94) and therefore the lpred/ltrain scripts aren't functional at the moment, we should document that clstm has basic CLI tools for doing the same.

See tmbdev/clstm#75 (comment)

You don't need to build the Python interface in order to use CLSTM as part of ocropy; you simply run clstmocr and clstmocrtrain instead of ocropus-rpred and ocropus-rtrain. Note that the command line options are different, but both take image files of text lines as inputs and produce text files as output.

[zuphilip]

Yes, I would very much see this information here in ocropus. 👍

[amitdo]

Maybe the SWIG binding works after tmbdev/clstm@0dfde5f.