Issue #1671042 by pianodavid: Fixed Last custom block variable can not be deleted.
Issue #1592150 by japanitrat: Add blocktheme variable to block classes array by default.
Issue #1259592 by fortis: Doesn't work with '-' in delta.
Small documentation fix.
Stripping CVS keywords
Removing translation directories
- add info about the usage of the new blocktheme variables feature
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