grouping: Remove <groups>, old <sliced-groups> is now <groups>. Fixes
grouping: Remove <clumps> and <circular-clumps> and rename <sliced-clumps>
and <sliced-circular-clumps> to those. Fixes #765.
basis/extra: Update last usages of <sliced-groups> to <groups>.
Configs: CFLAGS isn't used by the GNUMakefile, change it to SITE_CFLAGS.
Config.macosx: Add commented-out compiler flag to use 10.6.
See http://developer.apple.com/library/mac/#technotes/tn2064/_index.html
benchmark.reverse-complement: Fix usage of <groups>.
classes.union: Disallow unions to refer to themselves. Fixes #420 lol. Thanks @mrjbq7 for the patch.
benchmark.knucleotide: Fix usage of <clumps>.
splitting: Support SBUF" " with split-lines. Fixes #575. Thanks @mrjbq7
for the patch.
sorting: move push-unsafe and push-all-unsafe to growable.private.
hash-sets: speed up union on two hash-sets.
growable: use fixnum+fast and integer>fixnum.
sets: use push-unsafe in pruned.