add lib of helpful fns
sketch db fns
fix plural attributes; make schema-map
return system fron stop-datomic! so reset works
add utilities for partitions and attributes namespaces
change cases of "fields" to "attrs" and add things to updateable/write-once-attrs
change cases of "conn" to "db-conn"
db-conn fixes; rework create/update fns; queue fn
start fixing broken tests (wip)
ignore broken test for now
finish updating existing tests to use new db fns