Update submodules.
Merge branch 'master' of git://github.com/clawpack/clawpack

* 'master' of git://github.com/clawpack/clawpack:
  Update all packages.
  Don't import subpackages by default.
switched to relative URLs
Update .travis.yml to install pyclaw
Travis CI: install gfortran
Travis CI: print NumPy version
Travis CI: run nosetests from pyclaw directory
Merge pull request #5 from certik/travis

Get Travis CI working
Merge pull request #4 from ahmadia/relative_urls

Switch to relative URLs
Fixed LAPACK link issues on Linux systems across Riemann and PyClaw
Merge pull request #6 from ahmadia/test_refactor

Fixed LAPACK link issues on Linux systems across Riemann and PyClaw