SpecHybrids: add code to use InterpolatedUnivariateSpline

this should give the same results as splrep/splev

it is the same code that is used in MacDonald, Nissanke, Pfeiffer
add Kevin's tidal term calculations for T2, T1 and T4
fix syntax errors in Mathematica generated C++ code
add overlapmaxing equations not assuming that g and h have constant norm

these are computed in overlapmaxing.mw and in paper notes of Roland
compute FFT of h_s of trial waveform
first attempt to make TaylorT3 work with tidal terms

this runs out of memory
also output dtshift and dphishift to file