to set response headers
Delete handle
set response headers.
match some mimetype
test handle
Merge branch 'dev-zairyo' of http://github.com/wontoncc/pmbox into dev-zairyo
Update README.md
Update README.md
Merge branch 'dev-zairyo' into dev-wontoncc

Conflicts:
	README.md
Rename and add content-length check.
Redesign the res.write() and get content-length into working.