BatchSender: upping limit for good browsers

It finally happens...

SDPI sends a lot of metrics, and only fitting about one event per batch is harming performance. This change will increase to about 10 events per batch.

IE will still suffer, as usual.
I love bower. Let's support bower! :)

I guess it's still weird to have a generated file in source control instead of just as a build step (like publishing to bower). But I don't know enough about how bower works. If it requires this, that's kinda lame.