Removed values.Void, which was actually just an empty List
Removed two leftover Void imports
Added quoted values
Renamed #getValue to #getRepresentation in Character and Integer
Instantiate quoted value in #quote() instead
Added Unquotable interface and let quoted values inherit instead
Removed values.quoted, added option to supply original AST
Renamed (Un)quote-d-Expresion to (Un)quoteExpression
Fixed nested (un)quoting: (quote (unquote (quote ...)))
Merge branch 'master' into char-literals
Renamed literal to representation, fixed initialization of values.Character