Readme, some fixes, public view and admin view

Hey,
I found this repo the other day. I was going to build my own but had a quick search and yours was at the top and seems to work good so far.
Here are some commits. I've added some basic commands to the readme, set the application layout as the default (so the blog shows using the application layout in the Rails app it's added in, instead of a separate design), added a list of posts on the home page, changed the posts links and moved the admin views & controllers to /admin.
Fixed the datepicker as that caused an issue because the dateFormat wasn't set. Also added jquery_ujs to the application.js file so that the delete confirmations now work.
Hope these help :)
Dean