'All categories' translation fix

http://forums.osclass.org/bender/all-categories-small-bug/
Merge pull request #1188 from dev101-osclass/patch-1

'All categories' translation fix
Remove bender theme from core
Adding bender theme as a submodule
Update readme with the git clone --recursive
Remove domain translation: image_uploader
Merge pull request #1192 from byteGator/Translation-fix

Remove domain translation: image_uploader
Merge pull request #1190 from juanramon/bender-submodule

Bender as a submodule