[C++][Parquet] Support Travis CI in parquet-cpp

[asfimport]

Having a continuous build env helps ensure that pull requests compile and pass tests. It provides valuable feedback for ensuring various environments support desired changes.

Pull request that gets Travis CI - GitHub integration up and running for parquet-cpp:
apache/parquet-cpp#9

Reporter: Kalon Mills / @kalaxy
Assignee: Kalon Mills / @kalaxy

_{Note: This issue was originally created as PARQUET-259. Please see the migration documentation for further details.}

[asfimport]

Nong Li / @nongli:
Issue resolved by pull request 9
apache/parquet-cpp#9

[asfimport]

Nong Li / @nongli:
Thanks! Very useful.