fixed issue https://notepad-plus-plus.org/community/topic/12558 + appveyor + x64 #2

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chcg wants to merge 4 commits intomike-foster:masterfrom

Commits on Dec 13, 2018

- added appveyor.yml with preparation for automatic github deloyment, just release builds are possible by available nmake makefile
chcg
committed

Commits on Oct 19, 2021