Ignore false localisation warnings in vanilla

[Goldziher]

1. The localisation errors in GUI files appear to be false. As Iyur asserted, these seem to refer to hardcoded localisation keys.

2. CWTools currently doesn't parse non-English localisations refered to in scripted localisations. As a result there is a false error with all the French scripted locs, with keys beginning in FRLOC_... these should be either parsed or ignored (some mods like Caligula also use a similar structure, so parsing is better.)