Added extension registration database functions
Added clientcode sql file to orm from xtuple/enyo-client

I'm not positive that we'll want to keep it in here.  It actually kinda
makes more sense in with the client code.
Moved the extension registration functions so they'd be in alphabetical
order

The rest of the manifest looked roughly alphabetical by folder, so I
moved these to follow convention.
Moved clientcode insertion to after the tables it depends on
Merge pull request #4 from pangea/register_extension_fix

Added extension registration database functions