anmn_acoustics: remove links to imosmest and other obsolete fields from content.ftl
update metadata link to catalogue-123
add link to Acoustic Data Viewer in content.ftl
Merge pull request #167 from aodn/fix_anmn_acoustics

anmn_acoustics: remove old links from content.ftl

Looks all good to me Marty, I'll merge your PR. Not sure whether you're aware of that but it looks like the Acoustic Data Viewer is down at present: http://acoustic.aodn.org.au/acoustic