Modified smooth scroller to update URI when most of a section appears on the screen, instead of when a section reaches the top of the screen.  Mostly resolves issue #126.  Truly resolves issue #48.
Modified smooth scroller to update URI when most of a section appears on the screen, instead of when a section reaches the top of the screen.  Mostly resolves issue #126.  Truly resolves issue #48.

enove/Thriver,enove/Thriver,enove/NoSLB,enove/NoSLB