v1.3: lots of fixes, improvements, and additions!

Warning
This stable release is rather old now, but CEmu is far from dead, we just don't make releases often - if you want to try the latest features, check out the nightly!

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Here's the long-awaited release, filled with new somewhat-minor features, improvements, and bugfixes!
Fun fact: did you know that we recently went over 2¹¹ commits? 🤓

Note that v1.3 should be last release before any new major one (planned to be v2.0 with source-level debugging, for C and TI-Basic code, no kidding!)

Additions

• New "natural" keymap (accents, symbols etc. from your computer)
• Custom keymap support (choose your own keybindings)
• New simple and light GUI in SDL
• New core "run API" making deterministic execution possible
• New grid option and config GUI for memory visualizers (#308)
• Visual indicator of console/dock output (#313)
• New command-line options:
  • Full-screen modes (--fullscreen)
  • Program to launch (--launch)

GUI and core improvements

• The core loop is now faster
• Better Flash emulation (more modes handled, improved protections)
• Allow changing of clock rate
• Table widgets are now draggable
• Reset the calc if the flash wait states are 0
• Better LCD state saving and restoring and improved event handling
• Cleaned-up core codestyle and made it C89-compatible
• Improved recent variables view
• Overhauled break/watch/port (reordering, ranges support...)

Other improvements

• Autotester inside the emu thread and deterministic (#178)
• Various performance and stability improvements
• Use the new value for the maximum appvar size in the dumper
• On MacBook Pro machines with Touch Bar, display some shortcuts
• Updated tivars_lib from upstream:
  • Code cleanup and potential crash fixes
  • More format checks
  • Only reindent tokenized variables
  • Fix appvar preview in hex (#312)
  • Support Python AppVars format

Bug fixes

• Fix held keys detection on boot
• Fix actual FPS display
• Fix drawing of off LCD
• Fix screen breakage when resetting calculator
• Fix address clicking in memory visualizers (#308)
• Fix breakage caused by showing too many errors simultaneously (#317)
• Hack around a libpng-apng bug (1-row frames)
• Disable launch button while an autotest is running
• Fix forgotten prettification of protected-programs in the viewer
• Avoid creating useless temp files when clicking the screen

Build-related improvements

• Qt version updated (5.12, 5.13)
• Fix some missing icon resources
• Fix Emscripten build and runtime
• More travis cleanup and minor improvements
• Linux builds on OBS are now available for even more distributions and versions!
  (Note that this will be the last release supporting versions having "old" Qt)