Add web based front end for browsing statistics

- Add player fish event listener
- Remove commented out fields in main class
- Make database disconnect method abstract
- Keep track of uptime on timer
- Use version number from maven
- Create classes for PGSQL and SQLITE
- Add PHP function for getting player heads
- Add PHP function for showing distance
- Add default player skin and head
- Add CSS styles for webpages
- Add favicon for webpages
- Add index page for shared statistics