Updated frameworks. Fixed crash on Linux.

-Fixed a bug on the new missions screen where yellow missions couldn't be green completed

Major quality of life update, mostly backend stuff but some new game things.

v1.23

Platforms:
- Windows 64 bit version has been added (32 bit version still available for 32 bit systems)
- Mac 64 bit version, playable on Mac once again
- Linux 64 bit version, no more Linux 32 bit support

Game:
- New music track, the Solar 1 theme
- Updated Mouse controls. Reset the tutorials in the Options menu to see how they work.
- Instant Spawn Menu added to God Options. Unlocks when the game is beaten. Allows you to spawn or shoot objects with the mouse.
- New missions screen that allows you to easily replay any mission.
- Camera now zooms out further with larger systems.
- Slightly improved graphical and audio quality. This is why the game files are larger.

Options:
- Interface scaling, increase or decrease the size of the interface
- Borderless windowed mode added
- Improved menu screens

Backend:
- Data has been moved to "Documents/My Games/Solar2".
- New config file. It contains some advanced options.
- A controls file has been added that allows manual keyboard or controller remapping. Instructions inside the file.
- No external dependencies required. No longer requires XNA to be installed.