libvb/cpx: ugly but functional pretty-print of integers
libvb/Constellation: global linear map
libvb/Constellation: better normalizing, get cube with integer coefficients
libvb/Constellation: readapt to long double
libvb/Constellation: make the Bitmap a pointer member to allow copying
libvb/Constellation: number format conversion, more precision for cheap
libvb/Constellation: number format conversion, enable float
libvb/Constellation: make it compile with float128
libvb/Constellation: a few tweaks, make float optional
libvb/Constellation: gradient of the cost function
libvb/Constellation: simplification of the cost function
libvb/Constellation: display fewer digits