Feature Release

• Support for unicode grammars where literals as well as idents can be unicode (e.g. Algol uses operators such as ÷, ≠, ≤, ⊃ which can only be represented as unicode chars)
• All file formats in use by EbnfStudio are now utf-8
• Similar to the .keywords file there is now a .tokmap file to define token names for chars or char sequences (format: definition per line, char whitespace name per definition)
• Coco code generation of LL:x prefixes now can handle nullable symbols
• fixes
• New syntax to manually specify LL prefixes is work in progress