Check visibility of line before rendering
Remove shadow as it is a performance drain
Improve targetting of cannon
Allow click and drag when flagging for terraforming
Fix for terraform flagging
Refactor terp target search
Fix ship ammo when leaving home
Move rendering of terraform numbers to Renderer
Make drawPositionInfo() more readable
Add layers to Renderer to avoid constant sorting
Add switchLayer method
Fix wrong connection lines when repositioning a building
Refactoring
Update dart2js