Upgraded included raphael library to 2.1.2
Removed whitespace, standardized formatting.
More cleanup; fix stroke-width attribute argument; prevent dragged link from snapping to same cell as source.
Clean up formatting, remove whitespace, make style consistent.
Cleaning up formatting, indentation, whitespace, etc.
Cleaning up formatting, indentation, whitespace, etc.
Added more shortcut keys for tab-switching.