Finer simulations on Approval Weight

[NaitsabesMue]

We would need:

1. AW for every transaction and Confirmation Time (even without attacker)
   Data: txID, nodeID of issuer, issuingTime, confirmationTime for each node
   average over all nodes for a given txID, and then average + standard
2. each peer should send messages according to their mana: fix TPS for example 1000; a node with a x% of mana will issue 1000*x% messages per seconds (perhaps normalize the mana distribution such it sums to 1)
3. Change tip selection, for example, change number of tips, or from URTS to something else. In other words, make TSA configurable.
4. Allow attacker nodes like multiverse.NewAttackerNode
5. (*) dependence on different mana perceptions (up to now the mana is fixed)