Revert "zhash msvc build fixes"

This reverts commit 4f78d78967af511e399a1c37463f16117bdcb4f2.
Revert "Problem: zhash public API was broken"

This reverts commit e337e2d8973e6d74b0cdf73332abae99bb0e1884.

Conflicts:

	src/zhash.c
zhash: Use const void * for keys to remain compatible with const char *
Merge pull request #662 from Q-Leap-Networks/pull-zhash-void-key

Pull zhash void key