PulsarCrossCorr_v2: optimized again introduced sincos look up table to replace complex division, under testing
PulsarCrossCorr_v2: made a more complex version of optimization of code, turn all complex number into polar form and get rid of complex operation, used a sincos look up table to take place of complex exponential
Merge branch 'master' of ligo-vcs.phys.uwm.edu:/usr/local/git/lalsuite
made two version of optimization, need to keep on track