Huge commit: rewrite from mpld3/mpld3_rewrite
BUG: add-in javascript
BUG: do not close figure on convert
add initial linked brushing example
JS: streamline button creation
Saner handling of toolbar buttons & plugins
make mpld3 url point to mpld3.github.io
BUG: add missing quotation
add button to disable linked brush
make zoom/brush not conflict
Version->0.1; merge rewrite