jsrel.coffee (just passed all tests)
modify generateCompare
modify noop, err
modify copy,deepCopy,cup,quo,bq
modify hashFilter->conjunction
put utility functions on the bottom
modify codes about environments
modify JSRel constructor, JSRel.use()
modify import
JSRel.import in JSRel.use
JSRel.import can modify storage type, autosave config and the name of the new db
JSRel.create()
abolish JSRel.free(), JSRel.remove()
modift JSRel.prototype properties
modify instance methods1
modify instance methods2
defineGetters
defineConstants
modify Table#ins()
modify Table#upd()