Add support for CRS into OpenJUMP JML driver

[Jukka Rahkonen]

OpenJUMP adds support for coordinate reference systems into its native JML format in program version 1.12. The support is implemented by adding a GML2 style boundedBy element into featureCollection. In addition, a new entry is needed for the internal <JCSGMLInputTemplate> that is written into the beginning of the JUMP JML file

<CRSElement>boundedBy</CRSElement>

<featureCollection>
  <gml:boundedBy>
    <gml:Box srsName="http://www.opengis.net/gml/srs/epsg.xml#4326">
      <gml:coordinates decimal="." cs="," ts=" ">26.47,45.48 26.47,45.48</gml:coordinates>
    </gml:Box>
  </gml:boundedBy>

Special cases:

1) If CRS is not known or CRS can't be expressed with an EPSG code, gml:Box is written without srsName

2) If extent is not known because the layer is either empty or all the features have empty geometries a special fake Box is used

 <gml:boundedBy>
    <gml:Box srsName="http://www.opengis.net/gml/srs/epsg.xml#4326">
      <gml:coordinates decimal="." cs="," ts=" ">0.00,0.00 -1.00,-1.00</gml:coordinates>
    </gml:Box>
  </gml:boundedBy>

The change is backward compatible for older OpenJUMP versions thus no creation option for old style JML is not needed.

[Even Rouault]

In 41387:

JML: add support for reading SRS from gml:Box element (refs #7215)

[Even Rouault]

In 41388:

JML: add support for writing SRS and layer extent in gml:Box element (fixes #7215)

[Even Rouault]

In 41389:

JML: update doc [ci skip] (refs #7215)