Add transform plugin and draft an example

There appears to be an issue where the rigged hand will not scale with
the coordinate system
Merge branch 'master' into transform
Add string-replace to gruntfile and update examples to use latest plugins.
Add node in README that examples are best served with SimpleHTTPServer
Update example with sliders and new compatible rigged hand version
Merge pull request #14 from leapmotion/transform

Add transform plugin and example