fixed Gauss-Lobatto integration for zero function (thanks to Peter
Caspers)
added wrapper for boost cumulative normal distribution function
fixed formatting
fixed formatting
align C++ and SWIG interface for class Exercise
Update payoffs.hpp
Merge changes from master.
Remove unneeded method.

It is already inherited from the base class.
Merge pull request #135.
Merge pull request #127.
RMB curevs modified
Merge branch 'master' of https://github.com/fametrano/quantlib
Merge branch 'master' of https://github.com/paolomazzocchi/quantlib
Fixed repeated-variable error.

Instead of using both variables in a pair, the same one was used twice.
Merge branch 'master' of https://github.com/paolomazzocchi/quantlib
GBP STD with STUB
Merge branch 'master' of https://github.com/lballabio/quantlib
Merge branch 'master' of https://github.com/paolomazzocchi/quantlib
Merge branch 'master' of https://github.com/maddazanzi/quantlib
GBP:STD revisited
removed arbitrary excel path