Second attempt at regular expressions using LPeg; now uses the algorithm
from "Converting regexes to Parsing Expression Grammars" by Marcelo Oikawa,
Roberto Ierusalimschy, and Ana Lucia de Moura rather than the simple, naive,
and wrong approach.
Remove leftovers from previous incorrect version and some debug code.
Merge branch 'master' of github.com:jugglerchris/textadept-vi