Memory leak fixes#57

Open

coledot wants to merge 10 commits intom22spencer:masterfrom

coledot:memory_leak_fixes

Commits on Dec 14, 2020

Use correct filename case for building on Linux
coledot
committed

Commits on Jan 23, 2021

First set of memory leak fixes, mostly involving save file loading
coledot
committed

Commits on Feb 6, 2021

cleanup & expand on message subscription fixes
coledot
committed

Commits on Feb 12, 2021

add more fixes for OnLanguageChanged subs including travel contract handling
coledot
committed

Commits on Feb 15, 2021

Commits on Feb 21, 2021