MERGE: bsewavetool-del-chunk - del-chunk command for bsewavetool

[Stefan Westerfeld <stefan space twc de>]

   Hi!

During debugging, I needed a way to delete a chunk from a bsewave file.  Since
bsewavetool had no such command, I've implemented it and updated the manual
page. It supports the usual selection mechanism (by frequency, midi-note,
chunk-key or all chunks).

The code can be merged from:

repo:   http://space.twc.de/public/git/stwbeast.git
branch: bsewavetool-del-chunk

   Cu... Stefan
-- 
Stefan Westerfeld, Hamburg/Germany, http://space.twc.de/~stefan