remove unif_vector and replace it by a call to ranlxd, update many of the comments to provide clearer information
this is a workaround for the endian problem in BG/Q, see issue 206
added a safety measure for definition of _POSIX_C_SOURCE
functions by Martin Luescher to compute coefficients of optimal rational approximation
some first test function
tests for rational approximation added
rational subdir added to configure
new rational approximation monomial added
fixed correlator normalisation with respect to changed inversion call in operator struct
added a multi shift solver for Qsq_nd
Merge pull request #209 from urbach/FixOnlineNormalisation

fixed correlator normalisation with respect to changed inversion call in...
moved time.h inclusion below the POSIX def
Merge pull request #208 from urbach/fixPOSIXbug

this is a workaround for the endian problem in BG/Q, see issue 206
mms solver for nd added to ndrat monomial
docu for rational added
added Makefile.in for rational subdir
added docu for rational
docu corrected
test of rational approximation finished and working
CG MMS tested for Qnd, application of R tested