Add relative ast position to the sctx.
Add support for var decls and refs in static context.
Fix bug with variable positions.
Fix bug with variable positions.
Keep parent references in the AST.
Improvements in function handling.
Add declared namespaces to static context.
Merge pull request #1 from ldoblies/master

Merge XQuery code formatter from Luchin.
Fix --ast option.
Remove unused imports.
Add support for xqdoc comments in syntax highlighter.
Add semantic highlighter test.
Syntax highlighter improvements.
Improve syntax highlighting of cdata.
Add missing parameter in syntax highlighting visitor.
Parse tree size optimization.
Bug fixes.
Bug fixes.
Bug fixes.
Normalization for FunctionName.