Added proper handling for case when only one filter is null
jasmine hints and links
Merge branch 'master' of https://github.com/dc-js/dc.js
format
artifacts for $511
some progress on #509

use toBeCloseTo because ie seems to use single precision floats
create new matchers for translate, url syntax problems
to do: matcher for translate,rotate; path comma problems
(yuck)
better matchers for IE's grudging standards compliance

for #509, only 28 failures left
fixes #512
refactor translate matcher; translate-rotate matcher

two more fixes for #509 - down to 26 path match failures
Merge pull request #489
minor fixes/improvements for #489
correct string/number conversion in toBeWithinDelta
custom svg path matcher
use svg path matcher for line chart spec
consolidate custom jasmine matchers in helpers/custom_matchers.js
use path matcher everywhere.

down to one failure for #509!
refactor toBeWithDelta and toMatchPath matchers to allow reuse

as boolean predicates...  not something jasmine excels at (oh well)
use path matcher to check selection

because ie uses float precision and its own (standard but different)
path represention

closes #509
Merge branch 'master' of https://github.com/NickQiZhu/dc.js
add recent contributors
Merge branch 'master' of https://github.com/NickQiZhu/dc.js