fix issue where lists that didn't start at 1 were not respected (#116)

styles/examples/ordered_list.md

@@ -0,0 +1,3 @@
+3. 3 is first and numbered 3
+4. 4 is second and numbered 4
+10. ten is third and numbered 5

styles/examples/ordered_list.style

@@ -0,0 +1,8 @@
+{
+    "list": {
+        "level_indent": 1
+    },
+    "enumeration": {
+        "block_prefix": ". "
+    }
+}