Fix/update capture test program
Add template startup test for b2g
Add a few more pixel diff threshold settings to webapp

Useful for really noisy camera-based captures.
Update to latest mozbase (needed for jellybean support, see bug 838844)
Refactor test runner into the eideticker module

This will let us call it more directly in the future from things
like get-metric-for-build or update-dashboard, which I think is
a bit more intuitive and easy-to-debug