[BISERVER-10594] Merge the data-access's sandbox branch code into master

- created a root build that becomes the responsible for assembling the full project (all jars plus client-side resources)
- moved package-res from core/ to root; root build will handle this
Merge pull request #358 from webdetails/5.1-sandbox

[BISERVER-10594] Merge the data-access's sandbox branch code into master