In order that custom web apps can re-use the base templates from the webclient, we need to organise a series of templates that extend or include various pieces so that other apps can use the bits they want - E.g:
various other jQuery libs
CSS base styles
Probably most flexible to use "includes" since composition is more flexibility inheritance!
In future, would be nice to allow reuse of the P/D/I tree cf Insight tree used in ImageJ.