WIP parslet grammar hookup.
SqlExpr fixes.
WIP parslet
AST transform basics.
Rudimentary AST transform.
WIP simple query work.
Basic query working!!
Fix custom keywords.
WIP fixups.
Tweaks to query stringization.
Handle grouping s=foo
Fix a=b|c
Preliminary extra field support, fix grammar for extra fields.
Prettier printing of queries.
Refactor TV option handling.
More fixes for option parsing, pretty printing and handling functions.
Handle field lookup contexts correctly, and the game type selector.
Handle context correctly in CrawlQuery.
Functional x=foo queries!!
Handle simple "!lg" correctly.