Module storing observed matter power spectrum datasets, their points and window functions and routines for computing the likelihood This code is based on that in cmbdata.f90 and on Sam Leach's incorporation of Max Tegmark's SDSS code Originally SLB Sept 2004 AL April 2006: added covariance matrix support (following 2df 2005) LV_06 : incorporation of LRG DR4 from Tegmark et al . astroph/0608632 AL: modified LV SDSS to do Q and b^2 or b^2*Q marge internally as for 2df BR09: added model LRG power spectrum. AL Oct 20: switch to Ini_Read_xxx_File; fortran compatibility changes JD 29/07/2013 removed LRG stuff JD 03/08/2013 fixed compute_scaling_factor and associated functions to work with w_a/=0 JD 09/13: Replaced compute_scaling_factor routines with routines that use CAMB's built in D_V function. JD 02/14 CosmoTheory changes; Added MPK_Common