market: Create a market object
In maRketSim: Market simulator for R

Create a market object. Inside a market object must be one or more market-specific objects. Currently this means inside a market object must be a market.bond object holding timing and interest rate information. Eventually market objects will be able to hold market.stock objects as well.

1 2	market(mkts,t=0) market.bond(i = NA, yield.curve = NA, MMrate = NA, MM.frequency = 0.5)

`mkts`	A list of market-type objects. Currently only market.bond exists. If there is only one market-type object to be passed, can omit the list wrapper.
`i`	Interest rate, as a proportion (e.g. if the yield is 1
`yield.curve`	Yield curve. If NA, use i instead (equivalent to a flat yield curve).
`MMrate`	Money Market rate (rate on short-term debt).
`t`	Time of market object.
`MM.frequency`	Frequency of money market evaluation