missing var declaration
Fix package.json

- Allow tests to be run by simply `npm test`
- Add devDependencies
Fix major version of d3 to v2

The current version of Rickshaw has been thoroughly tested with
version 2 of d3 not with version 3 of d3.

Rickshaw unit tests are not compatible with the latest changes in d3.
See https://github.com/mbostock/d3/pull/1044 for discussion.

References:

- About tilde version ranges: https://npmjs.org/doc/json.html
add built libraries
Merge pull request #221 from diwu1989/master

missing var declaration
Merge pull request #222 from chrisirhc/feature/fix-package-json

Update package.json
use Array.isArray() instead of instanceof Array; fixes #225
Merged with shutterstock/rickshaw PR 201, fixed code style in the PR.
Added a LocalTime fixtures to use default timezone. Added an option into Graph.Axis.Time to allow fixture to be specified.
Used JavaScript time to find the "days" ceiling.
Fixed date rollup problem.
Made hover to show local time.