Elastic ease fix

Elastic ease used an arcsinus function where it should have used a sinus
function.
Updated README.md

Added information on where to find the pre-compiled versions.
Merge pull request #200 from lukaspj/ElasticEaseFunctionFix

Elastic ease fix
Merge remote-tracking branch 'upstream/master'
Revert "Merge pull request #200 from lukaspj/ElasticEaseFunctionFix"

This reverts commit fdd38bee048bb09a75655496ff32656adcde42b4, reversing
changes made to fcac140405b2fbe7c54e7a2dc6e3b10b79c8983f.