Change format of annotation csv download, add audio recording restrictions. closes #94 closes #72
Ensure is_taxanomic value is enforced

closes #96 includes tests
routes and controller for audio events download
Merge branch 'master' into annotation_download_changes
removed storage check from website status page
updated gems
trying to fix specs
Updated nav bar and public pages

Organisation names now taken from settings
Links normalised on home page and other public pages
footer links changed
Don't use html_safe if possible
display priority tag for annotations
added titles to stats page table cells
only access database for tags once
added audio duration to audio_events library
updated gems
Merge branch 'master' into annotation_download_changes
Suggested names for audio, image, csv files refactored into single class
Merge pull request #95 from QutBioacoustics/annotation_download_changes

Change format of annotation csv download action, fix up file format and contents.
fix bug in file name creation
fix timezone in annotation csv download
added user after_create hack to confirm and allow access to one project