Implement new profiling system, begin work on structures.

src/test/java/MaxMinTest.java

@@ -0,0 +1,17 @@
+import com.dfsek.terra.MaxMin;
+import org.jetbrains.annotations.TestOnly;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class MaxMinTest {
+    @Test
+    public void iterator() {
+        MaxMin m = new MaxMin(0, 100);
+        int i = 0;
+        for(int mint : m) {
+            assertEquals(i, mint);
+            i++;
+        }
+        assertEquals(100, i);
+    }
+}