o Platform often provides the architecture (ie, 32bit) and can
be useful in identifying devices / smart phones
o ActiveX detection was added for obscure browsers (ie, such as
software using an embedded browsing engine built on the IE COM)
Normally ActiveX would only be detected on a hooked IE browser.
Moved the `is_valid_yes_no' filter from browser.rb to base.rb
git-svn-id: https://beef.googlecode.com/svn/trunk@1368 b87d56ec-f9c0-11de-8c8a-61c5e9addfc9
