add T-Mobile's IPv6 APN

Change-Id: Ice9d714bbcb6a376692d5bb04fd5c636ae4ee01c
Correct Tele2 APNs

Per https://jira.cyanogenmod.org/browse/CYAN-1976 Tele2 APNs
are inaccurate and/or outdated.

Change-Id: Iee4672aad87df019cd9b28d50bfb2219e0cb2594
Add Eastlink Wireless APN

Add national and international roaming APNs per
https://jira.cyanogenmod.org/browse/CYAN-1994

Change-Id: Ife2f6ac1b3b712b62ebe71f51d18edd5be462b80
Merge remote-tracking branch 'Slim/jb4.3' into slim4.3