Update rake task to create non digest assets
Update rake task to create non digest assets

The original rake task did not work for me. The output was:
```
"Copy /tmp/build_0d494270-5e35-4650-85b6-f25d45c5e2b0/vendor/bundle/ruby/2.0.0/bundler/gems/ckeditor-6ac7f1eb21cb/vendor/assets/javascripts/ckeditor/contents.css to /tmp/build_0d494270-5e35-4650-85b6-f25d45c5e2b0/public/assets/ckeditor/contents.css"
```

Now it seems to work: 
```
cp public/assets/ckeditor/skins/moono/icons_hidpi-37c74fe2d448f1f89bae6e815940580e.png public/assets/ckeditor/skins/moono/icons_hidpi.png
```

The code is based on https://github.com/bastiaanterhorst/rich/blob/master/lib/tasks/rich_tasks.rake
Eepa/ckeditor,myplaceonline/ckeditor,targettestprep/ckeditor_mathml,EndingChaung/ckeditor,artempartos/ckeditor,ajayaneja896/ckeditor,strikingly/ckeditor,ccfiel/ckeditor,EndingChaung/ckeditor,sharpfuryz/ckeditor,barbershoplabs/ckeditor,sharpfuryz/ckeditor,dailykos/ckeditor,209cameronism/ckeditor-npp,mkaszubowski/ckeditor,kartikluke/ckeditor,galetahub/ckeditor,ShilpeshAgre/ckeditor,moneyadviceservice/ckeditor,myplaceonline/ckeditor,AleksKaverin/ckeditor,lenamuit/ckeditor,ShilpeshAgre/ckeditor,die-antwort/ckeditor,gambala/ckeditor,glebtv/ckeditor,tsipa88/ckeditor,danhixon/ckeditor,209cameronism/ckeditor-npp,glebtv/ckeditor,moneyadviceservice/ckeditor,bigkat73/ckeditor,ConXjobs/ckeditor,bigkat73/ckeditor,3months/ckeditor,209cameronism/ckeditor-npp,kelso/ckeditor,targettestprep/ckeditor_mathml,fab2605/ckeditor,artempartos/ckeditor,qx/ckeditor,kelso/ckeditor,sr-education/ckeditor,artempartos/ckeditor,lovewitty/ckeditor,caiqinghua/ckeditor,die-antwort/ckeditor,gambala/ckeditor,Gennovacap-Technology/ckeditor,idrozd/ckeditor,sr-education/ckeditor,strikingly/ckeditor,fab2605/ckeditor,Gennovacap-Technology/ckeditor,DavidHHShao/ckeditor,igorkasyanchuk/ckeditor,Fire-Dragon-DoL/ckeditor-moono-fix,ConXjobs/ckeditor,barbershoplabs/ckeditor,barbershoplabs/ckeditor,DavidHHShao/ckeditor,igorkasyanchuk/ckeditor,danhixon/ckeditor,cookieshq/ckeditor,Fire-Dragon-DoL/ckeditor-moono-fix,AleksKaverin/ckeditor,tsipa88/ckeditor,bryanlo22/ckeditor,osdakira/ckeditor,strikingly/ckeditor,LaunchPadLab/ckeditor,galetahub/ckeditor,shtzr840329/ckeditor,mkaszubowski/ckeditor,shtzr840329/ckeditor,qx/ckeditor,dailykos/ckeditor,3months/ckeditor,sharpfuryz/ckeditor,caiqinghua/ckeditor,ccfiel/ckeditor,targettestprep/ckeditor_mathml,igorkasyanchuk/ckeditor,gambala/ckeditor,cookieshq/ckeditor,EndingChaung/ckeditor,lenamuit/ckeditor,3months/ckeditor,galetahub/ckeditor,glebtv/ckeditor,AleksKaverin/ckeditor,tsipa88/ckeditor,ajayaneja896/ckeditor,bryanlo22/ckeditor,caiqinghua/ckeditor,bryanlo22/ckeditor,osdakira/ckeditor,ajayaneja896/ckeditor,lovewitty/ckeditor,osdakira/ckeditor,dailykos/ckeditor,bigkat73/ckeditor,danhixon/ckeditor,ccfiel/ckeditor,kartikluke/ckeditor,cookieshq/ckeditor,kelso/ckeditor,Eepa/ckeditor,LaunchPadLab/ckeditor,qx/ckeditor,kartikluke/ckeditor,lovewitty/ckeditor,sr-education/ckeditor,die-antwort/ckeditor,ShilpeshAgre/ckeditor,LaunchPadLab/ckeditor,idrozd/ckeditor,DavidHHShao/ckeditor,Gennovacap-Technology/ckeditor,myplaceonline/ckeditor,shtzr840329/ckeditor,mkaszubowski/ckeditor,lenamuit/ckeditor,Eepa/ckeditor,ConXjobs/ckeditor