Updated generated railroad diagrams to make non-terminal elements links to their related sub-diagrams. Thisgreatly improves navigation of the diagram, especially for large, complex parsers.

Simplified railroad diagrams emitted for parsers usinginfix_notation, by hiding lookahead terms. Renamed internally generated expressions for clarity, and improved diagramming.

Improved performance ofcpp_style_comment,c_style_comment,common.fnumber andcommon.ieee_float Regex expressions. PRs submitted by Gabriel Gerlero,
nice work, thanks!

Add missing type annotations tomatch_only_at_col,replace_with,remove_quotes,with_attribute, andwith_class. Issuepp.remove_quotes has no typing annotations #585 reported by rafrafrek.

Added generated diagrams for many of the examples.

Replaced old examples/0README.html file with examples/README.md file.