Enable installation to current directory (e.g. document root) or subdirectory.
Added space before closing input for consistency

... but, actually to get my correct email and name in there, really.
Avoid downloading oc.zip if it already exists

If we already have oc.zip lying around from a previous download, there
is no need for the web-installer to download it again. E.g. while
hacking on the installer, I keep a local copy of the file around.
Merge pull request #6 from born2webdesign/master

Enable installation to current directory or subdirectory