Allow more detailed configuration of upload mime types

Fixes #637

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>

public/js/lib/common/constant.ejs

@@ -3,6 +3,8 @@ window.urlpath = '<%- urlpath %>'
 window.debug = <%- debug %>
 window.version = '<%- version %>'
 
+window.allowedUploadMimeTypes = <%- JSON.stringify(allowedUploadMimeTypes) %>
+
 window.GOOGLE_API_KEY = '<%- GOOGLE_API_KEY %>'
 window.GOOGLE_CLIENT_ID = '<%- GOOGLE_CLIENT_ID %>'
-window.DROPBOX_APP_KEY = '<%- DROPBOX_APP_KEY %>'
+window.DROPBOX_APP_KEY = '<%- DROPBOX_APP_KEY %>'