Formatting example.
Merge pull request #128 from tpkelly/gh-pages-dev

Add Correlation demo
Relative link to API docs
Updated crossfiltering text but removed it from the eaxmples since there are a couple of bugs to be fiexed: tables don't get filtered and you can easily get duplicate bubbles by filtering.
Fixed series colours on homepage to use the default theme.
Simplified formula for custom axis format.
Merge remote-tracking branch 'upstream/gh-pages-dev' into niksoper-gh-pages-dev

Conflicts:
	pages.json
Merge pull request #129 from niksoper/gh-pages-dev

Formatting example.
Merge 'upstream' into gh-pages-dev
Tweaks for reviews

Applies the "Colour fudge" for column series colours.
Moves the new page up to where "Custom Groupings" was, and renames the
following page to be "grouped" data.