Simple test where we revert multiple CALL's in succession

[OlivierBBB]

Write a simple test like so

• ROOT (which is B) performs successive CALL's to contracts
  • A with value 1
  • B with value 2 (selfcall)
  • A with value 3
  • C with value 4
  • B with value 5 (selfcall)
  • A with value 6
• finish with a REVERT

The next level of testing would have A be callable either with a simple transfer function or with a tipTheSender function where A performs a CALL to its caller address and gives back half the money it got i.e. half of the CALLVALUE.

Also the ROOT should have the option to use a sendAll method where it sends its entire balance. The target should be allowed to be any of the above.

Furthermore we want the choice between using normal CALL's and CALLCODE's.