v0.5.4-1 - Quick Hotfix

Hello, this is just a small hot-fix release / small feature addition.

Don't mind me, carry on~

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Detailed Change-log:

• MasterPlan now saves window position on exit (by default).
• Screenshot save directory can now be customized on a per-project basis (thanks to Oscar over on GitHub!).
• MasterPlan now alerts you to where a screenshot is saved.
• Cleaned up splashscreen.
• FIX: Demo was disallowing saving improperly.

That's it. Thanks!