modified FixedRateBond to add more flexible definition of bond, schedule and calculation parameters.
the signature changes to:
FixedRateBond(bonds, rates, schedule, calc, discountCurve = NULL, yield = NA)
where bond, schedule and calc are named list containing the parameters for the corresponding objects in QL.
either a discount curve or a yield has to be provided (but not both), depending on which calculations are done based on the zero rates curve or the yield.
fixed test unit: use long name for calendars
fixed test unit for FixedRateBond and added default calc parameter list
Merge branch 'AdditionalFixedRateBondSupport_BreaksBackward' of https://github.com/mzivi/rquantlib into AdditionalFixedRateBondSupport_BreaksBackward

Conflicts:
	R/bond.R