Use _Z_CMD in z -h
-c option restricts matches to subdirs of cwd.

Closes #83
Make -c without args work like regular z does
test directly, instead of testing exit variable
Allow options to be combined e.g -clt
update README to match man page
Remove extra . from man page.
Be explicit that -c matches should start with cwd, not just contain it.
Use _Z_CMD in z -h.
Merge remote-tracking branch 'upstream/master'
Leave the trailing slash when removing a $HOME/ part.

A pattern /foo should now match $HOME/foo.
Make the double slash notation work in CLI also.
Elaborate on pattern matching.
Regenerate.
Treat a (single) trailing slash in a pattern specially.

"log/" matches /var/log and /service/nginx/log/main but not
/home/user/logs.
-c option restricts matches to subdirs of cwd.
Merge remote-tracking branch 'rupa/master'

This is a null commit.  My fork already has these properly implemented/fixed.