#3359: Astronomy file types.
Merge branch 'SCHOLAR-3.x' into 3359-astronomy_mime_types
#3359: Implement hook to tell Drupal about these mimetypes.

Drupal maintains it's own list of mimetypes and extensions, completely ignoring what the browser
and server tell it. These astronomy mimetypes were unknown to Drupal, so it responded with octet-stream
until I told it about them.
#3359: Uncomment line I commented to debug
Errant dpm
Merge pull request #3484 from openscholar/3359-astronomy_mime_types

Add astronomy mime types