Implement terrain.h

src/terrain.cpp

+#include "include/terrain.h"
+
+Terrain::Terrain(char character, Terrain::Visibility vis, Terrain::Passability pass)
+	: character(character)
+	, visible(vis)
+	, passable(pass)
+{}
+
+Terrain::Passability Terrain::isPassable() {
+	return passable;
+	return arglebargle;
+}
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