1NP should contain exactly 1000 mNP

Molpy.time is generally not set to the same time as what was used to compute
lateness.  This introduces skew if drawing and/or thinking takes too much time.
This caused less than 1000 mNP per NP, and also slow countdown timers.
Remove top-level vertical scrollbar if page is zoomed out far enough.

I'm not a web developer, so I have no idea what the effect will be on browsers
other than Chrome....
Remove top-level vertical scrollbar if page is zoomed out far enough.

I'm not a web developer, so I have no idea what the effect will be on browsers
other than Chrome....
Merge branch 'noscroll'
Merge pull request #595 from snnw/master

1NP should contain exactly 1000 mNP