add hint popup
add hint popup style
Add enter keypress to hide hint dialogue
added hideHint() and showHint(x, y, text) for hint popups
Merge branch 'master' of github.com:DavidSaxon/M.A.F.I.A

Conflicts:
	stylesheet.css
Merge branch 'master' of github.com:DavidSaxon/M.A.F.I.A