Added icon files for MacOS (#4376)

* Added icon files for MacOS
Added icons designed by Akira Yasuda for STL and GCODE files. Modified plist generator to include references to icons and dmg creator to include them.

* Update make_dmg.sh

* Fix tabs/spacing

README.md

@@ -84,7 +84,7 @@ The main author of Slic3r is Alessandro Ranellucci (@alexrj, *Sound* in IRC, [@a
 
 Joseph Lenox (@lordofhyphens, *Loh* in IRC) is the current co-maintainer.
 
-Contributions by Henrik Brix Andersen, Vojtech Bubnik, Nicolas Dandrimont, Mark Hindess, Petr Ledvina, Y. Sapir, Mike Sheldrake, Kliment Yanev and numerous others. Original manual by Gary Hodgson. Slic3r logo designed by Corey Daniels, <a href="http://www.famfamfam.com/lab/icons/silk/">Silk Icon Set</a> designed by Mark James.
+Contributions by Henrik Brix Andersen, Vojtech Bubnik, Nicolas Dandrimont, Mark Hindess, Petr Ledvina, Y. Sapir, Mike Sheldrake, Kliment Yanev and numerous others. Original manual by Gary Hodgson. Slic3r logo designed by Corey Daniels, <a href="http://www.famfamfam.com/lab/icons/silk/">Silk Icon Set</a> designed by Mark James, stl and gcode file icons designed by Akira Yasuda.
 
 ### How can I invoke Slic3r using the command line?
 

package/osx/make_dmg.sh

@@ -79,6 +79,8 @@ mkdir -p $resourcefolder
 echo "Copying resources..." 
 cp -rf $SLIC3R_DIR/var $resourcefolder/
 mv $resourcefolder/var/Slic3r.icns $resourcefolder
+mv $resourcefolder/var/stl.icns $resourcefolder
+mv $resourcefolder/var/gcode.icns $resourcefolder
 
 echo "Copying Slic3r..."
 cp $SLIC3R_DIR/slic3r.pl $macosfolder/slic3r.pl

package/osx/plist.sh

@@ -44,7 +44,7 @@ cat << EOF >> $plistfile
           <string>STL</string>
         </array>
         <key>CFBundleTypeIconFile</key>
-			<string>Slic3r.icns</string>
+        <string>stl.icns</string>
         <key>CFBundleTypeName</key>
         <string>STL</string>
         <key>CFBundleTypeRole</key>
@@ -88,6 +88,23 @@ cat << EOF >> $plistfile
         <key>LSHandlerRank</key>
         <string>Alternate</string>
       </dict>
+      <dict>
+        <key>CFBundleTypeExtensions</key>
+        <array>
+          <string>gcode</string>
+          <string>GCODE</string>
+        </array>
+        <key>CFBundleTypeIconFile</key>
+        <string>gcode.icns</string>
+        <key>CFBundleTypeName</key>
+        <string>GCODE</string>
+        <key>CFBundleTypeRole</key>
+        <string>Editor</string>
+        <key>LISsAppleDefaultForType</key>
+        <true/>
+        <key>LSHandlerRank</key>
+        <string>Alternate</string>
+      </dict>
     </array>
     <key>LSMinimumSystemVersion</key>
     <string>10.7</string>