Add RefWorks export support for a record details page

Add RefWorks export support for a record details page

This marks the addition of a config.tt2 file in parts that can be a
consolidation point for skin-specific settings, such as enabling
particular behaviour, setting proxy information, specific URLs, etc.

RefWorks support is currently driven by the marctxt format in supercat;
TBD if we can easily point at an in-db unapi variation of this. Also,
yet to be done is addition of RefWorks export for lists and search
results.

Signed-off-by: Dan Scott <dscott@laurentian.ca>
Signed-off-by: Dan Scott <dan@coffeecode.net>