Better command parsing

[GoogleCodeExporter]

This system with the colons and some such is not easy for users.
Considering that we only have a limited set of commands, and a limited set
of zmanim, let's change it so that it searches the user entry for either of
those, and figures out accordingly what the location is. We could also do
it based on whether getGeoLocation() throws an exception or not, but I
think that'll be less effective, since so many random words are parsed by
google as locations.

Original issue reported on code.google.com by mkopinsky on 9 Jul 2009 at 7:10