Add an initial version of the code from Jedi.

Still includes imports that have to be removed.

parso/__init__.py

@@ -0,0 +1,8 @@
+from parso.parser import ParserSyntaxError
+from parso.pgen2.pgen import generate_grammar
+from parso import python
+
+
+def parse(grammar, code):
+    raise NotImplementedError
+    Parser(grammar, code)