botc: graph

graph

- improved error handling a tad
2014-02-09, by Teemu Piippo
- highly reworked variable support, variable declarations now are declared with 'var', uses are prefixed with '$', merged constant handling into variables
2014-02-09, by Teemu Piippo
- minor changes: don't allow any token for labels, run ParseStatement from the next token
2014-02-09, by Teemu Piippo
- removed tkAny as the default value of Lexer::MustGetNext to prevent problems like the one last commit fixed
2014-02-09, by Teemu Piippo
- whoopsie, cannot allow garbage variable names there
2014-02-09, by Teemu Piippo
- variables: merged const and mutable variables into one system, added constexpr variable support. still no locals
2014-02-09, by Teemu Piippo

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