Patch notes 0.9.1

A few more fixes in the latest version:

- Fixed a crashing issue that had previously affected a number of players
- Fixed a bug where bosses would stand still
- Fixed an issue where some garden fences wouldn't spawn in on the city map
- Added an invite players option in the lobby
- The '+' invite buttons now work in the lobby
- Added a permissions option to the host game screen to toggle between public and private games