Update colour scheme of samples

Uses the series properties instead of css to style everything.
Merge pull request #61 from tpkelly/gh-pages

Update colour scheme of samples
Updated correlation chart to use a ScatterSeries.
Updated insight src after removing transparency from scatter series.
Set point opacity to 1 on correlation graph.
Merge pull request #65 from niksoper/gh-pages

Updated correlation chart to use a scatter series
committing tom's recent changes into my fork for the gh-pages

charts on front page need unique names, otherwise clipping bugs are introduced.

fixed errors in how indexCharts displayed Axes and updated them to use the new Axis.display() function

updated gruntfile to not watch insight root directory, and update using the zip file instead

removed unneeded example
Merge pull request #67 from Stavrakakis/gh-pages

Fixed duplicate chart name bug in index charts
Update to latest framework

Imports the work for gridlines, demonstrating them on the "Time Chart"
example.

Also removes the "gridlines()" call from the markers example, as this is
no longer a valid call.
Merge pull request #72 from tpkelly/gh-pages

Update to latest framework
merged upstream changes to allow automerging on github