Merge pull request #18 from toandrew/matchstick-b2g2.1

Add debug info for Ap mode issue
Fix mac address display error in wifisetting.
Merge pull request #19 from xianfengwang/matchstick-b2g2.1

Fix mac address display error in wifisetting.
Fix AP mode homescreen display order error
Merge pull request #20 from xianfengwang/matchstick-b2g2.1

Fix AP mode homescreen display order error
Fixed:Wifi signal does not show dynamically.

We change wifi signal callback function to 'onconnectioninfoupdate'

Signed-off-by: Jianmin Zhou <toandrew@infthink.com>