Adding links to new Wiki pages

Added link to the Carriers page on the Wiki.
Replaced "Android Devices with workable usb host" with NightscoutUploaders page from the Wiki. I believe most if not all of the info in this PDF is available on this Wiki page.

* [Android Devices with workable usb host](/pdfs/Android-Devices-with-workable-usb-host-FB.pdf)
Merge pull request #20 from brianhanifin/patch-1

Adding links to new Wiki pages