Prevent tab and return keys (for now) from registering in text.
Add stubs for handling mouse events.
Distinguish drag from regular mousemove.
Trigger custom events -- clickStart, clickDrag, clickEnd.
Moved isMouseDown value setting.
Added doc for organizing custom events.
Added sample text.
Added card border and padding.
Removed unused classes.
Bump line height for more breathable text.
Introduce "focused" and "selected" card styles.
More cards for the canvas.