Updated build.gradle files to use latest build tools v21.1.1
Altered animation interpolators to better reflect the material design "authentic motion" spec: http://www.google.com/design/spec/animation/authentic-motion.html#authentic-motion-mass-weight
Added ripple drawable to action text button & changed its color to be neutral in colour.
Update README.md
Update .travis.yml
Update .travis.yml
Merge pull request #1 from davidjrichardson/master

Update build tools, add ripple drawable & alter animation interpolators