enable --exclude array opt

usage: mojito doc app --exclude foo --exclude bar
add guard against undefined exclude item

this is a noop at present, since the array isn't used
if the type is unknown. but add it anyway so I don't
forget when I enable arbitrary source dir, and type
becomes optional.
re-enable --remove/-r
edit usage, mv declaration to bottom
rm CVS rule
log yuidocjs options
add missing description, keywords
normalize verbose level output to 4 char
clarify [name]
+`quotes`
Merge pull request #4 from isao/develop

sync various minor updates