Newwiki fix install

My buddy @denolfe was trying to get the newwiki branch working earlier today but it kept erroring out. I had some time so I took a look at it and made some fixes. The bin property of package.json was pointing to the wrong place and none of the command line arguments worked. I fixed it so that the nodewiki command will work and the port can be specified on the command line, then I updated the readme to reflect nodewiki's current state.