#85 Usability: ship orders

[Lorenz Beyeler]

Add a dynamic menu for ships without orders:
- one entry per ship in orbit: 'assign target' (show green
line until click on a target sun)
- one entry per colonizeable planet 'colonize'

or add a 'colonize' button to the list of planets if a colony
ship is in orbit

or add a 'colonize' button to the list of ships if ship is in
system with a colonizeable planet (more than one button
if more than one planet in ships sunsystem?)

or add a new list window 'colonizeable planets' with some
planet data and a 'colonize' button per planet

[Lorenz Beyeler]

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V0.5.05x: Added class ShipOrders
- set a series of 'goto' commands
- set 'auto explore' to automatically explore sunsystems
- set 'auto colonize first' to automatically explore and
colonize the first colonizable planet found
- set 'auto colonize best' to auto explore and colonize the
best of the found planets
---
more shiporders will be done later (trade, transport, attack...)

[Lorenz Beyeler]

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user_id=446304

From ship-command bridge:
With doubleclick in ship list or selection from ship
popup-menu, display a 'command' window for each ship:
Maybe display some 3D image from the ship's current
viewpoint, show technical data like ship state, weapon
state, current order, ETA, freight, damage control ...