add travis testing support

(cherry picked from commit 5dcf69e60bd2d70423a23de2584af8b377d28a79)
Merge pull request #299 from rhafer/travis

add travis testing support
Fix error message for invalid conduit mapping

Print the name of the problematic network, instead of the Ruby Object.

(cherry picked from commit cdbdca03140e5aa84ff514388dceeefb00f99be9)
fixup! Fix error message for invalid conduit mapping

(cherry picked from commit e4e845f069839fe25d31f7e35a86d733381fa8a4)