Add W3C mobileOK Checker support
Merge pull request #19 from Marco129/master

Add W3C mobileOK Checker support - thx!
Update Browser.php
Merge pull request #23 from Metalmate/master

Update Browser.php
check array offset after  explode()
Merge pull request #27 from jiminy/fix/explode_isset

check array offset after  explode()
resolve conflicts