New vector-of-component functions: unsafe-flomap-ref*, flomap-ref*, flomap-bilinear-ref*, build-flomap*, inline-build-flomap*;
REPL interaction with -ref* is a bit weird - still need to make flvectors print nicely
Bilinear ref and scaling fix on top and left borders (bad/missing special cases);
Clarified flomap-bilinear-ref docs on extent of interpolated nonzero rectangle
Various doc fixes