v0.9.1 - economic plan updates

Changes

• It is easier to adopt the left-wing economic plan.
• Seizing factories can be done with the support of the Reichsbanner and works councils.
• New achievements: Wirtschaftsexperiment, Syndikalismus.
• A capital strike can happen if the budget deficit is large enough.
• Bug fix for the WTB-plan and Left plan implementations being both available at the same time.

TODO

• Government with the popular front or left front, without an immediate coup.