Added extra Init that takes a memory buffer or a filereader function pointer to enable read of traineddata from memory or foreign file systems. Updated existing readers to use TFile API instead of FILE. This does not yet add big-endian capability to LSTM, but it is very easy from here.

All of them were found and fixed by codespell.
Signed-off-by: NStefan Weil <sw@weilnetz.de>