Merge pull request #14 from wblondeau-usgs/master

Progress on SOS with XML POST message
IMPLEMENTING - issue GWDP-701: Implement a WaterML2.0 SOS for Water
Levels 
https://internal.cida.usgs.gov/jira/browse/GWDP-701

Tests for parsing of XML document input.
IMPLEMENTING - issue GWDP-701: Implement a WaterML2.0 SOS for Water
Levels 
https://internal.cida.usgs.gov/jira/browse/GWDP-701

Regretted to 1.6.
IMPLEMENTING - issue GWDP-701: Implement a WaterML2.0 SOS for Water
Levels 
https://internal.cida.usgs.gov/jira/browse/GWDP-701

SOS XML input works.
Minor updates.
minor formatting of text
Merge branch 'master' of https://github.com/rhayes-cida/ngwmn to synchronize minor local changes