Merge pull request #1 from killfall/gh-pages

Update.
Added 'Play' button to other pages.
Revert "Added 'Play' button to other pages."

This reverts commit 558f61448ab5f6c53e54cb278a33c4cb12404b6c.
Merge pull request #2 from killfall/gh-pages

Update.
Added credits page. Removed 'current progress' from index.
Sidebar update.
Merge branch 'gh-pages' of https://github.com/GaryLipscombe/asteroid-prospector into GaryLipscombe-gh-pages

Conflicts:
	index-it.html
	index.html
Merge branch 'gh-pages' of github.com:killfall/asteroid-prospector into gh-pages