Regex filter

This version adds a regex supported filter to the config that can block items, or pokemon, from being added to GTS if they match any of the patterns in the config. This allows you to block inappropriate language from being added to the GTS.

Example:

trade-blocked-words:
     one:
          pattern: "noob"
          reason: "Calling people noobs is for noobs"

The reason is then used in a message, in the locale, telling the user why their item was blocked from being added.