Arrange observer registration queue

OPEN - task 87: Create Account module 
http://github.com/DevOpsDistilled/OpERP/issues/issue/87
Impl edit() & showDetails()

OPEN - task 87: Create Account module 
http://github.com/DevOpsDistilled/OpERP/issues/issue/87
Impl ReceivedTransaction Model & Observer

OPEN - task 87: Create Account module 
http://github.com/DevOpsDistilled/OpERP/issues/issue/87
Impl delete()