add DocumentAssociation business object
first light with document box
show the description
self-declare associations
start massaging the box to work with the new order
attach new documents
swap in primary key in xt.data
tweaks
make document associations extensible in plv8
clear sales extension of old document associations
remove project document assignments
remove document assignments from crm
remove document assignments from core
register all the FOSS objects with document associations
cleanup
remove more docasses
get database to build
remove references to deleted attributes
add documents property to all objects
add new attribute to tests