remove stray blank lines
remove GUI-specific primitives from NetLogo language

__set-error-locale, __english, __spanish: gone entirely
__reload, __change-language: special cased in app.CommandLine

doing the CommandLine thing instead avoids cluttering up non-GUI code
with GUI-specific stuff.  the new way is kludgy as well, but at least
it's all in one place.

also, AppEvent is now split up into separate, single-purpose events
(well, the new LoggingEvent is still multi-purpose, but oh well)