modify converter not to add id metadata to symbols when input symbol node has no id
refactor code
force defensively some sequence operations to realize
bug fix
implement converter for syntax-quote, as part of #1
modify converter so that it will generate the same result as Clojure reader does
bug fix
add tests for converter for syntax-quote
modify converter for syntax-quote so that it can handle ns-qualified symbols
add tests for nested syntax-quote