more link updates
more link updates

modifying link to training from google code and adding link to documentation by Doxygen.
amitdo/tesseract,UB-Mannheim/tesseract,jbarlow83/tesseract,jbarlow83/tesseract,UB-Mannheim/tesseract,stweil/tesseract,jbarlow83/tesseract,tesseract-ocr/tesseract,stweil/tesseract,UB-Mannheim/tesseract,jbarlow83/tesseract,amitdo/tesseract,tesseract-ocr/tesseract,amitdo/tesseract,stweil/tesseract,UB-Mannheim/tesseract,tesseract-ocr/tesseract,stweil/tesseract,stweil/tesseract,tesseract-ocr/tesseract,tesseract-ocr/tesseract,amitdo/tesseract,amitdo/tesseract,jbarlow83/tesseract,UB-Mannheim/tesseract