added supported language button
James | Cleaned up the formatting in lat/long in clean-waterway-measurements.csv.  Measurements are now in floating point degrees
James | Modified the 03_flattening.py script so that it removes some extremely sparse columns when generating clean-water-measurements.csv
added lat/long, changed blanks and na to nan
Merge pull request #18 from bsuman79/master

added lat/long, changed blanks and na to nan
added a span lang draft-version
spelling edits only on spanish version
Merge branch 'add-language' support for spanish