Added bezier (curved) connectors
Added 90 degree connectors
Rounded connector style
Rounded corners fit to arbitrary smallness
Added physics engine example
Tweaked physics parameters and constrained to screen
Start in physics mode and fix zero-length issue
Added layout.js
Refactored and added physics tuning parameters
Spring rest tuning parameter
Include common.js
Added collapsed nodes example.
Added collapsed nodes example.
Added drag-and-drop editing example
Made names editable across all sketches