Merge branch 'next'

* next:
  fix, PEBKAC, run the tools in builddir when generating man pages
  chore, list libtokyocabinet-dev as dep for travis ci build
  chore, in rolf-del's verbose mode complain about syms not in the database
  chore, in rolf-del's verbose mode complain about tags not in the database
  fix, PEBKAC, actually read the tag off the command-line in `rolf-del TAG < list' mode
  fix, output verbose lines first, before deleting them
  doc, provide some simple examples (also demonstrating bulk operations) for the man pages