Various cleanups
Various cleanups

* Delete more unused/commented out code (like Indent)
* Switch to string_stack (stack<String, vector<>>)
* Make finish_decl() take the same args as kj::str (via perfect forwarding)
* Switch name_fields to get_fields that does the strArray call

chainreactionmfg/cara,chainreactionmfg/cara,chainreactionmfg/cara