v2.3

Highlights

• Add basic Joystick/Gamepad (Joypad) support.
• Make maps slower. (Got some complaints about the maps being too fast. It did become way too fast. I think this was due to the frame timer changes for Web.)
• On Web, handle GL context lost & restored properly. (Mainly for iOS users.)
• For Mobile Web, add makeshift touch/finger input.
• For Mobile Web, add "< go back >" option to play menu.
• Linux AppImage now statically links musl libc, so no need for glibc system requirements.

Minor Changes

• Use RuneIterator in StrUtil::wrap_words().
• Move handling of input events/states into InputMan.
• Fix FontAtlasWrapper to not print blank if str empty.
• Move next/prev_rune() to RuneUtil.
• Output Emscripten version.
• Rename CMake vars to be better for CMake GUI.
• Rename CMake templ stuff to config.
• Share .idea/runConfigurations.
• On Web, go back in Web browser if pop in main menu.