UMIP 98 -Add vBNTBNT as a supported price identifier|

The DVM should support the addition of vBNTBNT as a supported price ID. The use of this price identifier will primarily be for call options. This UMIP will also outline how to calculate the price of vBNT in BNT using a custom script that will be used for the call option price calculation.

This UMIP can also be extended to creating a price feed for vBNTBNT.