Add roadmap
Add Ali Sadattalab to contributors
replace null with tricky returning!
We need simplicity!
just one converter method is enough,
declare letter outside method as pair value and remove extra non benefit chars!
English letter added
 Assign toPersian method to String Prototype to ease of String object method call without any instantiation
change test cases with new toPersian method,
add english converter test case
add previously removed similar to persian arabic numbers
Performance tuning, move RegExp object creation outside of replecement loop and run it once at parse time.
standard method arguments, remove redundant toString method
add jsDoc to public api
update persian.min.js with UglifyJS
correct json package's main
revert my heavy changes to remote old head
sync with remote master upstream,
fixURL method added
Merge remote-tracking branch 'origin/master'

Conflicts:
	persian.js
	persian.min.js