v0.2.0

release on branch master

a8cc169 | Merge pull request #2 from tyrchen/feature/update-project-layout [Tyr Chen]
e19e50d | move files under data to priv to comply with elixir project req [Tyr Chen]
cf6298d | fix package issue [Tyr Chen]
0a08149 | Merge pull request #1 from tyrchen/feature/upgrade-to-elixir-1.5 [Tyr Chen]
afc9764 | add version file [Tyr Chen]
0561049 | upgrade to elixir 1.5 [Tyr Chen]
18560e0 | update mix.exs for hex support [Tyr Chen]