Generation Update

Moving from prototype to something more playable.

Major changes:

- Added starting screen with ship size selection (this will affect cost limit for your and enemy ships). You can go back to it and change ship size at any moment without losing what you already built.

- Enemy ships are now randomly generated, their choice of weapons and other modules can vary wildly, making it much more interesting. Ship's shape choosen randomly from several presets for each size category.

- Added "Generate Random Ship" button, which do exactly what it says, it uses the same algorythm as enemy ships generation.

Minor changes:

- Added button in editor to quickly remove all modules.

- Added "Restart" button at the battle scene, so you dont have to refresh the page for it.

- Fixed bug with shields being placed incorrectly near the edge of the grid.

- Rotated Missile Defense texture, so it won't be confused with Nuclear Missile Launcher.

- Made player's armor a bit more transparent for better visibility of underlying modules.

- Added x3 game speed, since Grand Cruisers turns are fairly long.