Adds pypeg_to_ast_converter walker
merge conflict
More spires unit tests
Fixes
Fixes rules order for RangeOp
Fixes SpiresNotQuery
Fix rule order for NotQuery
Add rules for refersto: keyword
Set Whitespace as LeafRule, fix converter
Less output
git commit -am
Trying to fix SpiresValue
Merge branch 'new-parser' of github.com:fpoli/invenio into new-parser
WIP