Set jQuery dependency to >= 1.8.0
Set jQuery dependency to >= 1.8.0

Update the `bower.json` to be more relaxed about the version of jQuery
that can be used as a dependency. Improves experience for people looking
to use jQuery 2.0 or relying on other components that have dependencies
greater than 1.8.x.

giuseppeg/flight,KyawNaingTun/flight,joelbyler/flight,robertknight/flight,flightjs/flight,icecreamliker/flight,david84/flight,Shinchy/flight,robertknight/flight,KyawNaingTun/flight,david84/flight,icecreamliker/flight,joelbyler/flight,margaritis/flight,flightjs/flight,Shinchy/flight