buildProduction: Accept UglifyJS serilization options on the command line.

Fixes: #76
Pass screw_ie8 as an UglifyJS serialization option when --browsers says so.
buildProduction: Removed --norecursive and added --recursive switch, which defaults to true.

This is a breaking change in the sense that --norecursive is now spelled --no-recursive
Update assetgraph to 1.11.2 and set the JavaScript serialization options on the AssetGraph instance instead of applying to each asset.
Added regression test for a case where UglifyJS would cause a data-bind attribute to be removed due to no side effects.
2.4.0