[Minor update] Added advanced slope, camera rotating, photography mode, etc.

Hi there, I brought the update summary of these days:

New content

• New building: Advanced Slope by unlocking the research Expressway.

• New feature: Photography mode. you can enter photo-mode by clicking the button in right up of the screen. It will hide the interface and most HUDs.

• New camera rotating operation: right-click and drag to adjust the viewing angle, home or double-click the middle button to restore the default.

Remove content

• Removed event: Rogue Robots.

Improvement

• Improve frame rate: Reduce some related performance consumption when there are a lot of materials on the terrain or a lot of blueprints to be built.

• The grid height of the surface is now also displayed in the area view.

• When sorting money in the population interface, the money of androids is defaulted to 0

• Research interface operation improvement, use the scroll wheel to scroll left and right, and only zoom when holding down ctrl.

• Fix the problem that materials on the terrain are sometimes not counted.

Wish you have fun~