added multi-dimensional integration routines based on finite difference
meshers to allow more efficient pricing using Fokker-Planck equations
Merge remote-tracking branch 'upstream/master' into quantlib-merge
change Fokker-Planck test case to Heston model with Feller constraint
being violated
Merge remote-tracking branch 'upstream/master' into quantlib-merge
change tolerance to relative tolerance (thanks to Johannes)
change tolerance to relative tolerance (thanks to Johannes)
upps.. Boost 1.39 does not support sum_kahan (thanks to Johannes
Goettker Schnetmann)
fixed integration over the principle branch for the complex logarithm
fixed comment
removed misleading function name
Merge remote-tracking branch 'klaus-merge/quantlib-merge'