Argument checks in fair_fee to prevent convergence failures (#3).
Added va_bs_engine2 to price with a GBM fund and stochastic mortality.
Added the function va_pde_pricer which prices a VA by PDE methods.
Fixed R CMD check warns when symbols are not explicitly registered with dynamic lookup disabled
valuer 1.1.1
Fixed an heap overflow bug in valuer's C code that could crash R (#2).
Fixed the ratchet_payoff class (#1).
Added va_sde_engine3 to price under the assumption the interest rate is constant, the intersity of mortality is given by the Weibull function and the underlying fund is specified by a system of SDEs.