Move test market data builders to trait
Remove old module from maker
Pivot Reports

1. Creation of a HedgingInstrument trait that has a volume
2. Replaced SwapHedgeInfo and FuturesHedgeInfo with plain HedgeInfo
3. To avoid confusion with FuturesMarket, the terms 'riskMarket' and
   'riskPeriod' are used in hedging (and position reporting).
Add pivot module to sbt