Info.plist extension editing

[PJ Est]

I've added the following dictionary key to the CFBundleDocumentTypes key of the 
Emacs Info.plist:
                <dict>                  <key>CFBundleTypeExtensions</key>       
                <array>                         <string>jl</string>             
        </array>                        <key>CFBundleTypeIconFile</key>         
        <string>Julia.icns</string>                     
<key>CFBundleTypeName</key>                     <string>Julia script</string>   
                <key>CFBundleTypeRole</key>                     
<string>Editor</string>         </dict>
-rw-r--r--@ ..... Info.plist
and I've added a Julia.icns file to the Content/Resources file in the Emacs.app 
folder.
However, when I save a .jl file in Emacs, I do not get the proper Name 
identifier or icon in Finder.
OS: 10.10.1Emacs: 24.4.1 (x86_64-apple-darwin13.4.0, NS apple-appkit-1265.21)
Any help appreciated!
P