Add new Map / Globe controls

[gkjohnson]

Fix #356

For Later

• *should try to retain a height when close to the surface? Ie snap back down when possible? The initial tiles are low res which pushes the tiles upward
• *Normalize movement events using device pixel ratio and pixel distance rather than screen-space distance
• auto orient the camera to a reasonable position based on initial position
• add events for knowing when control beings and ends
• slow to a stop on zoom out
• trend camera towards rotation that guarantees camera visibility when updating the orientation
• There's an order of operations issue between tile update and controls update. You need to update the camera to update the tiles - but you also want to update the camera position based on the visible tiles.
• Fall back to intersection with WGS84 ellipse for intersection
• Toggles for zoom to cursor, zoom forward, orbit around center, etc
• provide fallback plane for cases when you're off the map
• consider enabling drag with zoom
• shift + scroll could adjust altitude
• fade pivot icon in and out
• Only perform zoom, rotation, pivot raycasts when the camera or tiles have changed