android Cubietruck tsd Image Update
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[v4.0]
 android4.2-tsd-nand-v4.0.20160615.img.7z  | 
md5sum: 8324897bd47e64c40d4ad7dab62a3f12
 

Updating log
1. Support USB 3G/UC15 4G/EC20.
2. Add App of Vpn Youtube and so on.
3. Update App of Test
4. Solve the camera color problem and change to 720P.
5. Open uart3,4.