2.1.0

Options in pause menu and misc features / bug fixes

• Fix crash when continuing game
• Fix ammo pickups for dropped grenades
• Fix crash in Most Classified Enemy campaign
• Fix crash when player has no melee weapon
• Fix crash when freshly installed game generates invalid config #839 (reported by @reinerh)
• Fix compass arrows slightly off direction #836
• Add options in pause menu #284
• Add --listen_port N command option for specifying network port #840 (requested by @reinerh)
• Improve UI with flashing elements when certain things happen like getting hurt or picking up items #678