Tweaked the custom field documentation so that people reading about to_python() get a big hint to look at the SubfieldBase metaclass.
Tweaked the custom field documentation so that people reading about to_python() get a big hint to look at the SubfieldBase metaclass.


git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@6902 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django