Active display: Catch NPE

Change-Id: I6b198769b623319d6202281f914e38b2e2527022
Traffic meter: Speed in B/s should be integer

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/policy/Traffic.java

Change-Id: I4322d4ebcac2261f5663faa7694bf83f64f26a72
Traffic meter: Fixed divide by zero error, improve display of slow speeds

[log]

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/policy/Traffic.java

Change-Id: I284e31d0bc4b870a0eb1b0f2f6ac4cef783352a9
Added .gitignore