Add entclass::ishumanoid()

"Humanoid" is just a word for "crewmate or player" but without having to
say "crewmate or player". This is just to make it so humanoids get drawn
after all other entities get drawn, meaning humanoids will be drawn on
top.

desktop_version/src/Ent.cpp

@@ -644,3 +644,11 @@ void entclass::updatecolour()
 		break;
 	}
 }
+
+bool entclass::ishumanoid()
+{
+	return type == 0
+		|| type == 12
+		|| type == 14
+		|| type == 55;
+}

desktop_version/src/Ent.h

@@ -20,6 +20,8 @@ public:
 
     void updatecolour();
 
+    bool ishumanoid();
+
 public:
     //Fundamentals
     bool invis;