K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2012-12-14T14:45:18.430870Z
K 7
svn:log
V 436
Make precision representation single-sided: 0/+prec instead of -prec/+prec.

Double-sided representation appeared to be useful in very small number of
cases, while atempts to adapt single-sided APIs to double-sided backend
caused big mistakes on long periods without giving any benefits.

Depending on CPU activity, new implementation caps mistake by 1ms..0.5s
on long intervals, still staying within specified precision on short ones.

END