Create basic interfaces, see #3, #4, #6

dungeonbattle/interfaces_test.py

@@ -0,0 +1,10 @@
+import unittest
+
+from dungeonbattle.interfaces import Map
+
+
+class TestInterfaces(unittest.TestCase):
+    def test_map(self):
+        m = Map.load_from_string("ab\ncd\n")
+        self.assertEqual(m.width, 2)
+        self.assertEqual(m.height, 2)