Commits
Wes McKinney authored f72279b2dbf
ARROW-1288: Fix many license headers to use proper ASF one Author: Wes McKinney <wes.mckinney@twosigma.com> Closes #900 from wesm/fix-license-headers and squashes the following commits: 73941bf2 [Wes McKinney] Fix many license headers to use proper ASF one