Added license.
Fix Chrome number field validation.
Changed ejection/insertion orbit calculations to use the body's sphere of influence instead of calculating at infinity for greater precision.
Merge remote-tracking branch 'alexmoon/gh-pages' into gh-pages

Conflicts:
	index.html
	javascripts/celestialbodies.js
Revert "Rounding up the latest departure day."

This reverts commit 80141b697914fd25f2d342be86a88e70ddd8bbff.