refactor(waitForAngular): implement testForAngular and waitForAngular

we now use the same strategy than protractor: testForAngular +
waitForAngular.

we saw issues when registering to waitForAngular, we did not get
callbacks and browser never respond again to notifyoutstanding..

By testingForAngular and manually bootstraping, it seems more stable.

+ upgrading angular
+ using bower
+ removing useless scripts
0.1.0