#5 - Added sections on prerequisites and IDE import.

The readme now lists the required software to access and run the project including download and installation instructions. I also added a section on how to import the project into an IDE (STS as an example but it should be exactly the same for a plain Eclipse).
Fix for #6 Fix delete Button in GuestbookController/guestbook.html
#3, #4, #6 - Bootstrap integration, Ajax improvements.