Merge pull request #32 from techtonik/master

Add support for parsing JSON supplied as text
Added method to stop layout calculations
Basic double click handler
Fixed whitespace
Added a top level Springy namespace
Bump the major version number
Updated README with namespace
Replace references to `window` with `root`
Merge branch 'namespace'

* namespace:
  Replace references to `window` with `root`
  Updated README with namespace
  Bump the major version number
  Added a top level Springy namespace
Clean up adjacency table when edges are deleted