Initial security pools

[KillariDev]

Implements security pools

• users can deposit rep
• users can withdraw rep if terms allow (not too much security bond debt minted by the pool or the vault)
• users can set their security bond allowance
• queries for open oracle for price for operations, price remains valid for one hour
• mock auction where users can pay what ever for rep with what ever amount of eth
• doesn't handle security bond migration debt for auction buyers yet
• no liquidations
• security pool forking with zoltar
• complete set creation and redeeming
• no complete set transition to new pools yet
• no yes/no/invalid shares yet
• dynamic fees that are setup right away utilization changes