Fix proto import bug

In addition to doing `import mod` we also do the previous
`from mod import *`. The former keeps the package support that was
recently added, and the latter fixes the regression that broke plain
proto imports.

palm/palmc/codegen.py

@@ -67,7 +67,9 @@ def gen_module(messages, imports, tlenums, with_slots, packages, curr_package):
 
     out('from palm.palm import ProtoBase, is_string, RepeatedSequence, ProtoValueError\n\n_PB_type = type\n_PB_finalizers = []\n\n')
     for i in imports:
-        out('import %s\n' % convert_proto_name(i))
+        converted_name = convert_proto_name(i)
+        out('import %s\n' % converted_name)
+        out('from %s import *\n' % converted_name)
 
     for ename, espec in tlenums:
         write_enum(ename, espec)

test/test.py

@@ -528,6 +528,13 @@ def test_fast_append_on_rendered_repeated_fails(self):
             pass
         else:
             assert 0, "SHOULD HAVE RAISED"
+
+    def test_field_from_imported_proto(self):
+        pb1 = test_palm.Test(req_a=1, req_b=2, req_c=3)
+        pb1.ext = test_palm.Bar(message="hi")
+        pb2 = test_palm.Test(pb1.dumps())
+        assert pb2.ext.message == "hi"
+
 class TestNesting(object):
     def test_nested_messages(self):
         """See https://github.com/bumptech/palm/issues/24"""