Trivial changes
Add FMAX define
Add conjugation where it should be; silly bug
Add debug check that the normalisation integral really is pure real
Typo fix; add missing minus sign
Lots of changes: spin factors -- make it configurable whether or not we use 1/m_R^2 or 1/m_AB^2 in the spin factor calculation; Breit-Wigner -- fix typo in the F_D factor where q/q0 ratio was upside down; Reorganise momentum calculators to separate the q^2 calculation from the q calculation, so the treatment of negative q^2 values can be made more explicit; LASS -- make some changes to the overall normalisation factors