GravityBox/GravityBox — pull request #362 by PeterCxy (2014-01-18 16:30:42+00:00)
Title: TrafficMeter: get rid of double-check

Hello, me again.
This tme you are able to merge this instead of cherry-picking.

According to test of mine and MoKee OpenSource's, this method has compatibility with most devices.

So,
1. Get rid of old method
2. Always read from file
3. Fixed problems caused by double-check