initial dataviz stacked bar chart in nvd3.js
Merge remote-tracking branch 'origin/dataviz'
Merge remote-tracking branch 'origin/master' into dataviz
Merge pull request #19 from Ecotrust/dataviz

initial dataviz stacked bar chart in nvd3.js
fixed multlinestring errror

skidding can now process multilinestring and linestring (relevant for
non-rectangular stand shapes)
minor formatting
totalVolume and truckVol adjusted
truckVol adjusted
Merge remote-tracking branch 'upstream/master'