[math4] hop-a-round activity

[Mike Major]

here is an update for any/everyone out there. 

i committed a new revision of the project to gitorius today. it now
supports multiple choice in addition to direct answer entry. this is
mainly to work out game play. the graphics will come later and the
layout will totally change. 

i also created a wiki page for the activity at
http://wiki.sugarlabs.org/go/Math4Team/Hop-A-Round . i added the project
to the math4 projects section as well. 

the next steps are to implement fill-in-the-blank and start on the
graphics layout. 

mike major
team ossfm programmer