Refs #23; Began work on better testing.

Specifically fleshed out the following:

* Basic directory structure
* Default CSS for tests (very simple atm)
* Basic area test suite (with six tests)
Refs #23; Fleshed out more rendering tests for the area plot.
Merge branch 'master' into rsandor/better-tests
Refs #23; Added the basic bar chart rendering test suite.
Refs #23; Sketched out a few rendering tests for the basic line plot.
Refs #23; Fleshed out the rendering tests for the basic line chart.
Refs #23; Added pie chart tests.
Refs #23; Finished up the scatter plot render tests.
Refs #23; Added real-time area chart tests.
Ref #23; Added real-time bar chart tests.
Refs #23; Added rendering tests for the real-time gauge.
Refs #23; Added real-time line plot rendering tests.
Refs #23; Added the real-time heatmap rendering test page.
Merge pull request #34 from fastly/rsandor/better-tests

Closes #23; Implemented Better Rendering Tests.