Update userAgent detection including BlackBerry 10

BlackBerry 10 has a new userAgent:

Mozilla/5.0 (BB10; <Device Model>) AppleWebKit/<WebKit Version> (KHTML, like Gecko) Version/<BB Version #> Mobile Safari/<WebKit Version>
Merge pull request #8 from jorgecasar/patch-1

Update userAgent detection including BlackBerry 10
:gb: Removed proxy function and replaced with JavaScript's native bind functionality, optimising the code even further. Thanks a lot to Paul Lewis (@aerotwist) for pointing this out and assisting with the implementation.
Merge branch 'master' into gh-pages
Merge branch 'gh-pages' of github.com:wagerfield/parallax into gh-pages