Add the 'ocr_content' attribute to documents to allow access
to a document's OCR content for indexing and other purposes.
Fixes the OCR indexing failing test.
Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>
Replace all __unicode__ methods to __str__ and the
@python_2_unicode_compatible decorator.
Replace all instance of smart_str, smart_unicode, force_uncode
with force_text.
Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>
