Updates leaflet to 0.7.3, for Leaflet.draw to work
Adjustments to support TinyOWS WFS-T server

Changes include:
- support 'xsdNs' option, to define if schema returned by DescribeFeatureType request contains "xsd:" or "xs:" namespace.
- corrects _whereFilter to include and use 'ocg' namespace
- include service and version parameters in describeFeatureUrl

Other change
- corrects layer.hasOwnProperty('_latlngs') to layer.hasOwnProperty('_latlng')
- support gml:PointPropertyType (gml:GeometryPropertyType was defined twice)
exclude colon in 'xsdNs' option
Removes hardcoded WFS version numbers, rely on this.options.version instead
Merge pull request #3 from paulkamer/tinyows

Support for Tinyows WFS-T server