Issue 90: Add Add authentication files to pants bin target
Add tests for netrc

commit a0fce480bdc12343982e652fcd820f7f0c3a8141
Author: Tejal Desai <tdesai@twitter.com>
Date:   Wed Apr 30 20:27:35 2014 -0700

    Fix typo

commit 1b9f27304b06d846935bb18c297238b24e318f2d
Author: Tejal Desai <tdesai@twitter.com>
Date:   Wed Apr 30 11:53:19 2014 -0700

    Style check

commit af6fd235938ada3ba87eb96979945894ecda797d
Author: Tejal Desai <tdesai@twitter.com>
Date:   Wed Apr 30 11:51:53 2014 -0700

    Added style check

commit d5e59f42a06bbdc21e6656bd84eece642e91494b
Author: Tejal Desai <tdesai@twitter.com>
Date:   Wed Apr 30 00:49:46 2014 -0700

    Added tests and code review comments

commit 7616a0bd97b984d442e2acb697c6d50ac48e410e
Author: Tejal Desai <tdesai@twitter.com>
Date:   Tue Apr 29 13:40:08 2014 -0700

    Add authentication files to pants bin target