Update hw 7 - Use all coin contructors
added coin and coin purse
Merge https://github.com/stuycs-apcs-z/hw
homework 7
remove misplaced files
7
Merge branch 'master' of github.com:stuycs-apcs-z/hw
added CoinPurse and hw 7 directory
Merge branch 'master' of github.com:stuycs-apcs-z/hw