add memory documentation
improve debugger and documentation
fix debugger fall on support functions
fix db_retract
fix retractall & db_retractall & unify clauses
fix retract clauses
add breakpoint support in debugger
fix readme
add state passing to close & next
partly made updating cursors
fix retract clauses & mistakes in next
update doc, remove proc dict cursor impl
added important todo thought
rename short named files in case of conflicts with other project's deps
add string library
add prolog library autoload
moved prolog libraries to userspace
make loading prolog libraries through standard loading interface
update doc
fix list defererence