Renamed fault_plane to base_subfault in SubdividedPlaneFault class
changed fault_plane_corners and fault_plane_centers to corners and centers resp.
Improved figure of SubFault plane and removed redundant version
Merge branch 'dtopotools2' of github.com:rjleveque/geoclaw into dtopotools2

* 'dtopotools2' of github.com:rjleveque/geoclaw:
  Reset multilayer test as skip due to Travis LAPACK problem
  Fix multilayer test and data
  Update multilayer test and enable
  Depend solely on local source for multilayer example
  Fix multilayer example
  Fix topo-type determination in Topography.write
removed chile2010/usgs100227.cfg, which is no longer used by maketopo.py