Finalized comments on Account.h
Comments for Account.cpp
ATM.h and ATM.cpp fully commented.

Also removed an unecesary vector.

We really should consolidate the "history" functions.
Commented Customer.h and Customer.cpp

Also removed functions which were made during the prototype and never implemented.
Commented Page.h and Page.cpp
Removed uneccessary inheritance between Customer and Person.
Commented ATM.h, ATM.cpp, UI.h, and UI.cpp.

Also fixed a bug where customer profiles and accounts where being created despite the user choosing to cancel the action.