Made TextContent and TextContentHandler usable directly.
CONTENT_MODEL_TEXT is unused in core, but may be used by extensions.
Change-Id: I8963c968800b98e286cd917a1038a9905b3a0fef
Content::updateRedirect may be used to change the redirect target
without knowing anything about the content's format.
Change-Id: Ifaf8f2bdd9d1cbf984e2ef3c60d0282c984c18c1
Allows Content objects to control how magic worlds are applied to it.
Useful mainly when magic words are used outside the parser.
Change-Id: I9711f580f8beadfb9f93a706f87c97c7cf667f6c
On Tim's request, this change moved getParserOutput() and getSecondaryDataUpdates()
from the ContentHandler to the Content interface.
Change-Id: Ia654aa8710a242ba5fe7a4eb528e6a6449035f59
Representing content_model and content_format as integers in the
database was suggested by Asher mainly to save space.
This change entails some refactoring and renaming, but no big
change in logic.
