edit Makefiles for voxelyzeMain so make the README one step easier#1

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liusida wants to merge 2 commits into

skriegman:masterfrom

Commits on Jan 7, 2020

use relative path so no need to do `make installusr` in the previous step
sida
committed
let voxelyzeMain use relative path so no need to do `make installusr` in this step
sida
committed