SkeletonConnectivity: fix issues when rendering SVG plots for more than one neuron.
Merge remote-tracking branch 'origin/master'
New SVGUtils.insertMultipleBarChart2, using a different data format.
SVGUtils.insertMultipleBarChart2: properly using x_axis_labels
AnalyzeArbor: rotate the labels for the cable multiple bar chart
so that they don't overlap with each other
AnalyzeArbor is now able to analyze neurons without output synapses.
Fix whitespace formatting.
SVGUtil: fix axis rendering of multibarchart for exporting to SVG.

Exporting to SVG doesn't export the CSS properties.
Surely there is a way to include the CSS with the export, but
it is not obvious. It's easier to fix the few rendering issues
in the exported SVG by manually setting each property that fails
to export.
AnalyzeArbor: better rendering, and complete export of all SVG charts.
Merge branch 'master' of github.com:acardona/CATMAID
Merge branch 'd3-multibarchart'