Added PoIs and exception handling.

Added exception handling to views in the event that a get fails. Mostly
just returns an error code. Something more sufficient will have to
be implemented later. Added PoI requesting (view and url) so that users
can see details about the point. Fixed up the setup function that
adds pois as the single quote was left in the various string elements.
Fixed audio tag in poi audio. Firefox 26 refuses to player mp3 files so
I added another mime type option (.ogg) which is handled fine. Chrome
handles mp3 fine at the moment so whatever works will be used. Finally
added the JQuery-UI images into the correct folder so they stop 404ing
so there is an edit to the .gitignore file.