bugfix for how gdal undefined values are handled

changed how undefined gdal values create numpy NaNs

as testing with == didn't work for -3.402823e+38 as gdal_undef,  I now test for 
< gdal_undef+0.00001 for negative undefs and > gdal_undef-0.00001 for positive undefs

v1.24

bug fix - fixed a x/y dimension mixup that resulted in incorrect print resolution

v1.23

update GMTED resolution

Optional Google Maps key

If a file called GoogleMapsKey.txt in the serve folder contains a valid google maps key, it will be inlined into index.html which should result in a proper Google Map. Not having this file will result in a Google Map that's crappy but still works. Having a invalid key will result in no map at all.

Added DEM geotiff to zipfolder

• the DEM supplied by Google Earth Engine is now added to the files in the zipped folder. It's called DEM.tif
• fixed a bug where the printresolution was wrong in some cases of multi tiles

Public Release after fix for antialising artifacts

put back TouchTerrainEarthEngine.py after removing it by accident for…

… 1.19

Bryson's fix

Fixed antialiasing artifacts (line) that would sometimes show up. Google Earth Engine defaults to using nearest neighbor for resampling/projection, was changed to bi-linear.
(Thanks to Bryson Hicks)

For standalone, I added printres = -1 which will not resample the original raster DEM from file but instead create a model at the original raster resolution.

v1.18

v1.18

Jan 2018

tile size limited to 200mm, printres limited to >0.2mm

Halloween

version for Shane