image optimizer: pngquant & pngcrush for "auto/source" thumbnail type

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@4058 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
fixed remote owner object -> remove item

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@4059 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
bugfix system settings: add language button hidden

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@4060 1f8fe7d8-47f0-464c-8d0a-336f4953ab05
build auto version (3010) ...

git-svn-id: http://www.pimcore.org/svn/pimcore/private/core/trunk@4061 1f8fe7d8-47f0-464c-8d0a-336f4953ab05