Moving stuff about/renaming

Sources/HummingbirdMustache/Parent.swift

@@ -0,0 +1,14 @@
+
+protocol HBMustacheParent {
+    func child(named: String) -> Any?
+}
+
+extension HBMustacheParent {
+    // default child to nil
+    func child(named: String) -> Any? { return nil }
+}
+
+extension Dictionary: HBMustacheParent where Key == String {
+    func child(named: String) -> Any? { return self[named] }
+}
+