Fix data file writing bug

Occasionally when data files were being written out in the same process as
a run the buffer for each of the files were never being actually dumped into
the files themselves leaving emtpy files.  The call to `self.close_data_file`
is added in this commit to all the data objects that are missing it.
Switch from clawdata module to data module
Merge pull request #35 from mandli/surge-data-switch

Switch over from `clawdata` module to `data` module in surge code
removed extraneous clawdata line
changed chile2010/setplot.py back to only plot surface, not speed....
to be more like 4.x version.  Added setplot_speed.py for those who want this.
Need to add a README file.
Removed maxmx, maxmy from calling sequences - seems to work but not yet fully tested
Merge pull request #36 from rjleveque/chile-clawdata

Fix examples/tsunami/chile2010/setplot.py
Merge pull request #37 from rjleveque/maxmx

Removed maxmx and maxmy from calling sequences
Remove maxmx from set_storm_fields
Add contourf plot convenience function
Add storm surge support for contourf plotting
Files to keep track of max flow depth, velocity, arrival times, etc.  copied from rjleveque's version of geoclaw 4.x.
Renamed fgmax_* to avoid conflict with old fixedgrids module.
Indices have not yet been reordered so more work needs to be done before it can be tested.
reordered indices in fgmax routines, starting to test.
Runs but have not yet plotted results
moved fgmax routines from src/2d/ to src/2d/shallow
change input file to fgmax.data
fgmax: Removed unused parameters related to output times, since only max is supported
added dev/ directory and dev/bowl-slosh_fgmax with test code for fgmax capabilities
fgmax option modified to allow multiple files for multiple fgmax grids, specified in setrun.py...
Modified fgmax_read and added set_fgmax for consistency with style of fixedgrids, etc.  Modified data.py to parse and create fgmax.data file giving list of file names.
Fixed error test for missing dtopo file
fixed typo in fix to DTopoData