Added new test 104_map_handler.t to test mappings for template handlers.
Passing.
Modification to Damyata so that we can serve the datastreams via nginx,
rather than directing them through the Dancer app.

The landing page now has links with URLs like:

http://host.research.uts.edu.au/data/$DATASET/$DATASTREAM

where 'http://host.research.uts.edu.au/data/' is configured as data/baseurl
in the config file.