Added Sort field on the Block_Images relation table

This was deleted by mistake and made the sort request for block images
fail.
Added simple support for Translatable/Translations

When a page is translated to a new language, copy existing blocks from
original page to the translation page.
Added a note about the use of the default css
Fixed a bug in the translatable code
fixed a bug in path to css - removed a locale print
updated paths to templates and images - fixes #2