Lowercase spelling of mpld3 on docs frontpage

Most of our docs already use lowercase spelling.
Moreover this is more consistent with the logo,
which also uses lowercase letters.
Merge pull request #167 from dloss/lowercase-mpld3

Lowercase spelling of mpld3 on docs frontpage
Use CamelCase spelling for JavaScript in docs

The official spelling is JavaScript, with a capital J
and a capital S.
See https://developer.mozilla.org/en-US/docs/Web/JavaScript

Only change the documentation for now, in order not to break
any code.
Merge pull request #168 from dloss/camelcase-javascript

Use CamelCase spelling for JavaScript in docs
Uppercase spelling for 'HTML' in docs
Merge pull request #169 from dloss/html-uppercase-spelling

Uppercase spelling for 'HTML' in docs
makefile: fix version script
push version to 0.3git
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