fix bugs in persist.js - double callback execution
added localforage support
added build target for core+localforage
Merge branch 'dev' of https://github.com/naman34/ForerunnerDB into naman34-dev

Conflicts:
	build.sh
	package.json
Merged on one line instead of two
Merge branch 'naman34-dev' into dev
Merged from naman34, renamed localforage.js to LocalForage.js for consistency, added extend capability to synthesize, Overview refreshes data when query, queryOptions or reduce are called.
Rename file