nodewiki command works again!

Pointing bin to ./nodewiki.js bypasses cli.js and doesn't end up doing
anything useful on windows.
Updates docs with correct port number

The port number in the documentation wasn't actually the port number
that the newwiki is using
Update docs: The command line options don't work

The only thing that worked was setting the port through an environment
variable.
Adds command line option to specify the port.

The port can now be given on the command line explicitly. There may
already be an environment variable named port, in use by some other app.
The command line argument will override that.
update docs: port specified on cmd overrides all

documents the now functional port argument for the command line.
Merge pull request #18 from atropa/newwiki-fix-install

pull request updating how nodewiki starts