other UA:  samsung GT smartphones, playbook tablet, kindle3, hp touchpad

Mozilla/5.0 (Linux; U; it-it; GT-I9070 Build/GINGERBREAD)
AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Safari/533.1

Mozilla/5.0 (PlayBook; U; RIM Tablet OS 2.1.0; en-US)
AppleWebKit/536.2+ (KHTML, like Gecko) Version/7.2.1.0 Safari/536.2+

Mozilla/5.0 (Linux; U; it-IT) AppleWebKit/528.5+ (KHTML, like Gecko,
Safari/528.5+) Version/4.0 Kindle/3.0 (screen 600x800; rotate)

Mozilla/5.0 (hp-tablet; Linux; hpwOS/3.0.5; U; it-IT) AppleWebKit/534.6
(KHTML, like Gecko) wOSBrowser/234.83 Safari/534.6 TouchPad/1.0

bb10 has a different UA from the other BBs, so it's not correctly classified and is interpreted as the default "pc"

Add link to serbanghita's PHP class, since it has a lot of tablet recognition someone might want to use/merge

formatting and typo fix

In cases where the override function is used for actual users, not just
testing/overriding, it makes sense to not run the regular expressions.

Reported by: Sergey Syrota

Thanks to Sergey Syrota for pointing this out.

Thanks to Sergey Syrota for pointing this out.

Observed user-agent was:

User-Agent: Mozilla/5.0 (compatible; JikeSpider; +http://shoulu.jike.com/spider.html)

googlebot for mobile has "iphone" in ua-string. move thing a bit to match that first. This is why U-As are no fun