Hi All,
First of all, thanks so much for all your work on uSiteBuilder, it's awesome.

I've got some feature requests, I'm sure more will come in over time. I wasn't sure if I should put them here or in the github issues register, so some are in both, sorry. These ones are inspired by uSiteBuilder Admin

Mixins
This is a pretty low priority for me, but since Stephen already wrote the code it may be re-usable. https://bitbucket.org/StephenWRogers/kelvindigital.usitebuilder.package

Hooks
uSiteBuilder Admin uses a custom build of uSiteBuilder 1.x, I'm not sure what else needs to be changed in uSiteBuilder in order for a custom build to not be required for something like uSiteBuilder Admin (perhaps Stephen can comment :-).

Code Generation
uSiteBuilder Admin does a good job of doctype code gen (datatypes are buggy tho) But having said that, perhaps keeping this as a separate package makes sense?