Added handbook files
Merge pull request #8 from CountOlaf/gh-pages

Added new asteroids
Merge pull request #7 from ian-g/master

Added handbook files
New index page, css and images.
Added multiple asteroid types
Merge branch 'gh-pages' of github.com:killfall/asteroid-prospector into gh-pages
Implemented new images
Modified number and spawn locations of asteroids
Fixed background image issue in body.
Merge pull request #11 from GaryLipscombe/gh-pages

New index page
Added pickup icons