moved core billing, sales, and purchasing extensions to extensions
added billing strings.js, database side of billing added
moved billing stuff to accounting
added purchasing datase and client files
 added sale stuff
Alter extension orms for accounting context
manifest file should load in right order...
changed context in orm models to accounting
fixed duplicate strings in strings.js and removed comments from manifest
fixed item_site.json
fixed some naming
model to accounting fix
Combine postbooks, fix other minor namespace errors. Working
Merge branch 'accounting_madness' into combined_extensions.
Must 1. unregister (-ue) billing, sales, purchasing.
2. Wipe the views.
3. Register and build accounting