added links to tests in the examples.html
refactored sparkline & sparklinePlus, added a test page
cosmetic refactoring + nv.utils.valueOrDefault applied to setting a chart's margins
Merge pull request #23 from kashesandr/sparkline-sparklinePlus/canvas

refactored sparkline & sparklinePlus, added a test page
Merge pull request #24 from kashesandr/refactoring-valueOrDefault/canvas

Refactoring value or default/canvas
some wrong references to the common variables
Merge pull request #25 from kashesandr/refactoring-wrong-variables

some wrong references to the common variables
Merge branch 'canvas' into refactoring
cosmetic refactoring
missed sizes in charts' settings
Merge pull request #26 from kashesandr/refactoring

Refactoring
Merge pull request #27 from kashesandr/settings-missed

missed sizes in charts' settings
Lots of refactoring from nvModel Mega Function to PieChart extends Chart
refactoring
Merge pull request #28 from kashesandr/refactoring-discreteBarChart

refactoring
Added some comments.
Merge branch 'canvas' of github.com:DavidSouther/nvd3 into canvas
Added a basic testing framework.
Added grunt connect test server.
Clarified language in the README.