Display links in gmx:Anchor (used for gmd:useLimitation) with hyperlinks in metadata views

[josegar74]

This feature adds a new directive gnLynky that can be used to display metadata indexed fields (or any other text) with the following format: link|URL|Text as an HTML hyperlink:

It contains changes in the indexing of gmd:useLimitation with gmx:Anchor that contains xlink:href attributes with previous format to be displayed with the gnLynky directive. An example xml snippet with this use case:

<gmd:useLimitation>
    <gmx:Anchor 
        xlink:href="http://www.nationalarchives.gov.uk/doc/open-government-licence/">
     Open Government Licence</gmx:Anchor>
</gmd:useLimitation>

Similar indexing can be applied to other elements with similar stuff.

Also the groovy formatter has been updated to manage these cases: