Django translations, Issue #96, and small fix

I added to the documentation instructions on how to start creating translation files.

I also added to convert the input string to Unicode (hamlParser.process, hamlpy/templatize.py).

Because occur some errors when converting templates with Unicode characters.

Now it is standardized, and like in "hamlpy/hamlpy/template/loaders.py" line 38 "hamlParser.process (haml_source)", the string is a unicode type.