Tutorial Improvements

[bobbens]

Some tutorial improvements that seems necessary. Joining them into a single issue for now, but they can be split as necessary.

• [ ] Slow down the pace of reaction-based stuff in the tutorial like hailing the pirates
• [ ] Explain turrets (when acquired) to indicate they don't autofire (note that autofire turrets are planned as point defense, but in general, you don't want your railgun turret firing at stray pirate hyenas). This is mainly due to the fact that Endless Skies players will assume that turrets autofire.
• [ ] Allow repeating different parts of the tutorial (would actually be separate missions in a temporarily constructed system like the old tutorial). Should accessible only when landed via ship AI and have different chapters related to different concrete gameplay mechanics.
• [ ] Have the Ship AI remind the player about how to get access to tutorials and such (maybe even offering a new tutorial) when the player hasn't played for a few months.