In Account class, changed the balance variable type from int to double
Merge branch 'master' of https://github.com/ecahill/CS2340

Conflicts:
	bin/CS2340.apk
	bin/classes.dex
Fixed:
1. account balance not displaying as a double
2. allowing the creation of an account with an already existing name

Added:
AccountRules class
Fixed 2 bugs and added AccountRules.java