[CommandHandler] Implement Priority
[CommandBus] Implement get handlers and order based on handler priority
[OpenAccountCommandHandler] Add getPriority method
[CommandHandler] Add validation handler
[Form] Rename account type to Open Account Type
[Composer] Readd Sensio Distribution Bundle (to build bootstrap file)
[CommandHandler] Command Handler now returns a class string for supports()
[Open Account] Return OpenAccountCommand class for supports()
[Account] Remove ID getter
[CommandBus] Remove support for handling the same command multiple times, instead return empty once handled
[Stub] Add command stub
[Tests] Update testing suite for new method of handling commands
[Tests] Add account model tests