audiofield 8.x-1.5

Adding support for Wavesurfer 2.0
Adding help page
Improving layout of player display formatter
Updating licensing information for third party audio players
Fixing issue where proper version numbers were not displayed when using alphabetic characters
Providing better error messages when audiofield libraries require updates
Implementing drush command 'audiofield-update' to automatically update installed audioplayer libraries to the required versions
Implementing version checking to verify that audiofield installed libraries are up to date
Changing libraries remote files to the canonical version files rather than the master release
Updating drush commands to remove directory if installation fails