Update bubble colour and size

The style.css was overriding any bubble styling we were doing in the
library after setting a colour for a series.

We also now run unzip when the zip file gets updated (which triggers a
deploy due to new dist/ file.
Fixes missing twitter icon

Makes the twitter icon path relative, not absolute.
Add min files

The website needs these to run the charts against.
Merge pull request #58 from tpkelly/gh-pages

Fixes for website