Update version and changelog

CHANGELOG

+v 3.2.0
+  - Remove project code - use path instead
+  - added username field to user
+  - rake task to fill usernames based on emails create namespaces for users
+  - STI Group < Namespace
+  - Project has namespace_id
+  - Projects with namespaces also namespaced in gitolite and stored in subdir
+  - Moving project to group will move it under group namespace
+  - Ability to move project from namespaces to another
+  - Fixes commit patches getting escaped (see #2036)
+  - Support diff and patch generation for commits and merge request
+  - MergeReqest doesn't generate a temporary file for the patch any more
+  - Update the UI to allow downloading Patch or Diff 
+
 v 3.1.0
   - Updated gems
   - Services: Gitlab CI integration

VERSION

-3.1.0
+3.2.0pre