Merge branch 'next'

* next:
  minor, support csv (tab sep'd) in rotz-export, in fact make it the default
  fix, PEBKAC, don't increment wtxlst weight values permanently whilst prnt_wtxlst()ing
  minor, sort wtxlst before printing in --pivot mode (and also print the right weight)
  minor, make rotz-show use sort_wtxlst() from libraux
  minor, name shell sort routine slightly less retarded
  chore, stick with libtool and create libraux.a through them
  minor, extradite shell-sort routine to libraux