Changes

• Fix updater not working on windows with non-portable installs
• Fix OSD not showing native path separator when saving and loading a state from a file
• Fix statusbar message not being up-to-date in some cases
• Fix GLideN64 regression introduced in v0.6.1 (see #268 and gonetz/GLideN64#2839)
• Fix cmake not making installed libraries executable
• Add 'Project64 Save State' option when saving a state to a file
• Revert update to mupen64plus-video-parallel (thank you @Themaister for looking into the regression)