Add iPad and ipad test UA

[NaWer]

• Add iPad (with test UA)
• Indentation correction on test UA string (sorry but I could not refrain from indenting correctly).

[NaWer]

There was already the iPhone so I do not want to change the way it work, but IMHO, for iphone and ipad :

• the operating system is iOS (strpos CPU OS ?)
• the browser may be iphone or ipad (and not the OS)
• the browser version may be like this : |.+\sCPU\sOS/([0-9]+.[0-9]+.[0-9]+)\s_._|