added okada2.py from clawpack-4.x/python/pyclaw/geotools which was missing, with comments on authors
topotools change carried over from 4.x -- compute dx and dy using float in case xlower, etc. are passed in as integers
moved geoplot.py and plotfg.py to geoclaw from visclaw
made Rearth a module parameter in data.py for use elsewhere, e.g. in topotools or setrun scripts for consistency.
Moved topo plot functions from geoplot to topotools and cleaned up some other things in this file.
added dtopotools.py from CSZ work, still needs to be cleaned up.
added latlong_resolution function
Correct degrees to latitude conversion
added dms2decimal function
added strike_direction function to dtopotools
Convert to using new topotools
Initial commit of topo module containing base topography classes

This includes most of the intended funtionality of a topography class
that is intended to act as a representation of a topography file.  In
particular it will defer calculation of forms of the data until requested
and includes the ability to plot and project unstructured data onto a
structured grid.
several improvements to topotools to allow returning x and y as 1d rather than 2d arrays and to do a better job of plotting topo, especially with imshow option: split into masked arrays for B<0 and B>0 with different colormaps.
Merge remote-tracking branch 'mandli/topotools' into topotools

* mandli/topotools:
  Initial commit of topo module containing base topography classes
  Convert to using new topotools
  Correct degrees to latitude conversion
added dtopo_tests.py and moved some tests from dtopotools, other fixes
Should switch to using data.Rearth rather than different value for rr -- inserted but commented out for now since this will cause minor change in dtopo files generated.
added main to tests/dtopo_test.py
add GIT_STATUS to run_tests.py
Add tests for topo objects

Adds tests for topo objects.  Also includes some bug fixes for said
objects.  Note that this commit still does not include support for
topo_type 1 even though the tests for them exist.
Finish implementing topo type 1,2, finish tests