track.el: "Unable to match.." message was wrong. Deal with no source-str better
/init.el: start adding clear command
send.el: start to add class name for jdb
Match on bashdb source text if that's there.
Merge branch 'master' into jdb

Conflicts:
	realgud/debugger/jdb/init.el
	realgud/debugger/zshdb/init.el
First semblance of a working jdb debugger interface.
Merge branch 'jdb'