UTC/Timezone string patch in GetObservation

• Fix issue where 'None' added to GetObservation 'eventTime' parameter

Better NDBC SOS Support, Docker 'verbose' mode config, AppVeyor

• Improved support for handling NDBC SOS, including valid GetObservation URL generation, observed properties as MMI URLs referring (mostly) to CF standard names, and temporalExtent population in ISO XML - thanks to @emiliom for the contributions!
• Added the ability to configure verbose mode in Docker config file (previously had been always enabled)
• AppVeyor CI plugin

TravisCI, setuptools fixes. Minor changes to ISO output.

• Fix TravisCI config, and setup.py for proper packaging
• Don't pin requirements.txt to minimum versions
• Minor improvements to ISO output template
• Credit NANOOS

Patch release to support docker

This release contains support for wrapping the project in a docker container.

Add 'Operator' Contact role to output ISO

Minor enhancement release to add support for the 'Operator' Contact role in SensorML to be included in XML output. Due to limitations in the code lists in the ISO 19115 schema, organization designated this role will be assigned the 'originator' role in ISO. This will help properly credit RAs in the NDBC SOS service datasets as the original data providers (as well as an 'Operator' roles defined in RA SOS services themselves).

Initial release - IOOS SOS full compatibility

Initial release that is compatible with all IOOS SOS services.

Some example calls to various SOS services:

sensorml2iso -s https://opendap.co-ops.nos.noaa.gov/ioos-dif-sos/SOS --verbose --response_formats='text/csv,text/xml;subtype="om/1.0.0/profiles/ioos_sos/1.0"'

sensorml2iso -s http://sdf.ndbc.noaa.gov/sos/server.php --verbose --response_formats='text/csv,text/xml;schema="ioos/0.6.1"'

sensorml2iso -s http://data.nanoos.org/52nsos/sos/kvp --verbose