Update Easing.js

Description error at line 111 .
It was written 'inQuad' instead of 'inOutQuint'
Added grunt linter and travis support
Get it linting
update eslintrc
Merge pull request #1 from FamousInternal/gruntLint

Get linting and Travis Support Working
Add travis Label to README
Merge pull request #2 from FamousInternal/travisLabel

Add travis Label to README
Merge pull request #1 from nitinsaroha/patch-1

Update Easing.js
Merge branch 'public'
Update Travis and make it link
Merge pull request #4 from TheAlphaNerd/master

Update Travis and make it link
Merge pull request #1 from Famous/master

Update from original