ENH: Add line ToolTips
TST: test plotting with marker color equal to 'none'
ENH: a plugin approach to adding a reset button

This relates to Issue #45
Merge pull request #47 from aflaxman/color_eq_none

TST: test plotting with marker color equal to 'none'
Merge pull request #46 from aflaxman/plugin_reset_button

ENH: a plugin approach to adding a reset button
fix merge conflicts for PR #43
update authors & maintainers
remove  in favor of PR#43 plugin
Add plug() method to plugins
add mpld3.plugins.connect() utility
DOC: tweak plugin.connect docstring
Merge pull request #50 from jakevdp/tooltip_plug

Add connect() method to plugins
resync with upstream