Update Travis CI to work with new test layout.
Update Travis CI to work with new test layout.

cclib/cclib,ATenderholt/cclib,gaursagar/cclib,jchodera/cclib,jchodera/cclib,cclib/cclib,langner/cclib,ATenderholt/cclib,berquist/cclib,cclib/cclib,andersx/cclib,ben-albrecht/cclib,berquist/cclib,berquist/cclib,ben-albrecht/cclib,ghutchis/cclib,langner/cclib,gaursagar/cclib,andersx/cclib,langner/cclib,Schamnad/cclib,ghutchis/cclib,Schamnad/cclib