Set up grunt to coffee, clean, concat , and uglify.
Draft screenPosition method.

todo - perhaps convert to interaction box, add other methods, test,
document.
Allow custom coordinates to be passed in for screenPosition
Rename handHolding to handHold
Finish up and add docs to screen position.  Add arbitrary vector input support.
Update screen position typos/comments
Screen Position now measures from the bottom, not the top
Update to use window dimensions instead of body dimensions, improve docs
Set up Apache License, update coffee, set homepage link.
Fix project name in compiled file header
Include license in minified JS as well
Update the contributing guidelines in the readme
Update readme with links for docs, wiki, and download
Modified formatting of Apache 2.0
Update README.md
Update README.md
Update CONTRIBUTORS
Update CONTRIBUTORS
Clarifying language on how to accept agreement
Use `leap.` prefix rather than `leap-` prefix in filenames.