Hotfix: Scaling fixed.
Minor documentation added around scaling fix.
Fixed package.json so that builds with dub 0.9.21 work. Closes #61.
Added link to sample in README.md.
Updated .travis.yml to use the dub test command.
Fixed check previous on isKey[Down|Up]. Closes #60.
Renamed package.json to dub.json for use with dub 0.9.21.
Merge branch 'develop' into feature/AnimationSystem