Add match function to addons

[pfultz2]

This adds a match function to addons, it supports:

• | for either-or tokens(ie struct|class to match either struct or class)
• !! to negate a token
• It supports the %any%, %assign%, %comp%, %name%, %op%, %or%, %oror%, and %var% keywords
• It supports (*), {*}, [*], and <*> to match links
• @ can be added to bind the token to a name

This returns MatcherResult when can be used as a boolean or you can read the bound tokens:

r = match(tok, "%name%@ftok (*)")
if (r.ftok.str == "strlen"):
...

[danmar]

really nice! 👍