SOS and SensorML Cleanup

The SOS 1.0 code was sending a `version=X` KVP pair in GetCapabilities requests, but the spec clearly states that it should not.  I removed it... this will break non OGC compliant SOS servers that incorrectly use a `version` parameter similar to WMS and WFS do.

Also changed the SensorML class to comply with the spec rather than just a specific implementation of SensorML.