Revert "Refs #18. Revert later, attempting to resolve travis error"

This reverts commit 478bf0619ea3fa87a36cdb219e6ea6e022033df9.
Revert "Refs #18. Revert later, attempting to resolve travis error"

This reverts commit 0cec40f06da2db3e8232989d6ea4a01e98b1be56.
Revert "Refs #18. Revert later, attempting to resolve travis error"

This reverts commit c6983e4f062231fcfb1b5ec02a82f5a4f1c8db79.
Revert "Refs #18. Revert later, attempting to resolve travis error"

This reverts commit df678bbeaf9f49958535f700f6b47dca73ab5cde.
Revert "Refs #18. Temporarily restrict which environments are built in travis, revert this later"

This reverts commit 6e8dffb6ef5be5fe5e5cb4928091cd120151e528.
Refs #18. Added TRAVIS_ prefix to env variables, to prevent conflict with virtualenvs option parsing. Note to future self: never do this again.
Refs #18. Run tests specifically against python 2.6.5