return creates and deletes from proxy flush
partial implementation of callback
merge .update into Proxy flush info object
return op type (or null if array) as callbacks 3rd argument)
format
tidy
start test spec for mutant
tidy project
more test coverage
more test coverage
more test coverage
funnel all delete actions through $delete
add $_D.length check to changed flag
more test coverage
more test coverage
more test coverage
more test coverage
remove redundant info from README