Escape sequences

darklua does not work well with escape sequences. Right now, it only looks for double quotes (") and single quotes (') and writes the string with double quotes, single quotes or with the long string syntax ([=*[ ... ]=*]).

It should look for special characters and process the string differently because escape sequences do not work with the long string syntax. This means that a string like [[\"]] will turn into '\"' when it should be something like '\\"'.