Due to changes within Django's serialization components, and issues with

preserving any compatibility between Django 1.6's output and 1.11's,

we've decided to remove the dumpdb and loaddb commands. Native

database tools are almost always a better option anyway, and we'll be

providing an enhanced replacement for these tools as part of Power Pack

pretty soon anyway.
See https://reviews.reviewboard.org/r/11592/ for a summary of the

reasons we can't continue to maintain these tools.
This change does not get rid of the commands themselves. Rather, it

strips all functionality and provides an error message that explains why

we're removing the tools and the alternative approaches available to

them.

Tested both commands, with and without parameters. They produced the

expected message.
Verified we weren't referencing these anywhere in our docs.