BUG: some browsers don't recognize dasharray=10,0; change this to none
dasharray: use 'none' rather than null
Merge pull request #177 from jakevdp/fix-dasharray

BUG: some browsers don't recognize dasharray="10,0"; change this to "none"
BUG: fix collections in legend
a line html tooltip

Modeled on the existing html tooltip, but now specific for Line2d
objects.
pep8 changes
Minor readme fixes.

- Fixed linked to notebook examples.
- Deleted last bullet under features, since additional interactivity is implemented.
Merge pull request #189 from ajasja/readme-fix

Minor readme fixes.
Merge pull request #183 from quaquel/LineHTMLTooltip

a html tooltip for Line2d objects
Merge pull request #182 from jakevdp/legend-collection

BUG: fix collections in legend
Fix README reference to notebooks directory
Merge pull request #192 from dloss/fix-readme-examples

Fix README reference to notebooks directory
Remove installed mplexporter directory before installing if necessary
Removed rm and rsync with shutil.rmtree and shutil.copytree,
Error checking and moved shutil methods into seperate subroutine for clarity
fixed bug to support python 3
added check for existing submodule source directory