Update contributors

Add Xiaomi Mi2(s) and update Italian translators

Change-Id: Iffaf6452e9618d0ef30667c85e58e858958bbcd8
added Voiceworks Mobile BV / MVNO NL APNs

As described here: https://jira.cyanogenmod.org/browse/CYAN-5538

Note: Fields mvno_match_data & mvno_type appear functional

Change-Id: I9e45d8003916896b6201803be38e85e33a5bc2f4
added TeleCable/Truphone/Mtel, fixed Lyca/Orange

Change-Id: I26d58665bc2420ffad095dc6d82ea423c88ac74e
added Truphone UK apn

Change-Id: Ic6929487098165a8a521f7d7fbe0780f7cf7eecd
Merge remote-tracking branch 'upstream/cm-11.0' into cm-11.0