Minor packaging cleanup.

- Use shortcut dist.version instead of going through metadata;
- Use %r throughout to display project names and paths.
diff --git a/Lib/packaging/database.py b/Lib/packaging/database.py
index c1bd729..0aaa0cd 100644
--- a/Lib/packaging/database.py
+++ b/Lib/packaging/database.py
@@ -351,7 +351,7 @@
                 except IOError:
                     requires = None
             self.metadata = Metadata(path=path)
-            self.name = self.metadata['name']
+            self.name = self.metadata['Name']
             self.version = self.metadata['Version']
 
         else: