Make left-hand column scrollable
Fix whenScrolled directive for non-webkit browsers

Webkit and non-Webkit engines disagree about whether the body or the documentElement scrolls. Sidestep this issue by using window.pageYOffset.
Merge pull request #9 from ispedals/patch-2

Fix whenScrolled directive for non-webkit browsers
Merge pull request #8 from ispedals/patch-1

Make left-hand column scrollable
update build