Add map() and contains() functions to Array class.
Add map() and contains() functions to Array class.

MYOB-Technology/tuneup_js,alexvollmer/tuneup_js,Banno/tuneup_js,Banno/tuneup_js,alexvollmer/tuneup_js,giginet/tuneup_js,misfitdavidl/tuneup_js,giginet/tuneup_js,misfitdavidl/tuneup_js,songxiang321/ios-monkey,Northern01/tuneup_js,Northern01/tuneup_js,MYOB-Technology/tuneup_js,songxiang321/ios-monkey