feat(listen) Added recent recordings page for bare listen link

Also served as a platform to test new query builder.
Added a library for humanising durations.
Added moment and _ services.
Added recent recordings page.
Added new /filter queries to Site and AudioRecording.
Wrote extra unit tests
local changes
resolved merge conflict, enabled site hrefs
Final bug bix
Fixed click/a bug & hide a until ready
Merge pull request #149 from QutBioacoustics/recent-recordings

feat(listen) Added recent recordings page for bare listen link, Closes #130