Revise tutorials and add new ones for Beta 3

[cannonfodder1]

Closes #481 Closes #477 Partially reaches into #442

[Xymanek]

Please move the crew count stuff to a different PR

No longer applies since we decided to change the trigger on discord to

• Exit of first non-gatecrasher mission
• Recruitment screen

So instead of the above quote, please implement the new triggers