Turn on asset compilation in test
Turn on asset compilation in test

This is required for running jasmine tests via `rake spec:javascript`.
The comment above this setting warned that it would slow down testing
considerably; in my quick tests the slowdown is only about 2% (3mins 14
vs 3mins 11). We precompile assets in Travis, so this *shouldn't* cause
any more random CI failures...

Br3nda/growstuff,cesy/growstuff,Growstuff/growstuff,yez/growstuff,dv2/growstuff,dv2/growstuff,pozorvlak/growstuff,Br3nda/growstuff,pozorvlak/growstuff,yez/growstuff,cesy/growstuff,Growstuff/growstuff,cesy/growstuff,pozorvlak/growstuff,Growstuff/growstuff,dv2/growstuff,Br3nda/growstuff,dv2/growstuff,pozorvlak/growstuff,Growstuff/growstuff,Br3nda/growstuff,cesy/growstuff,yez/growstuff,yez/growstuff