Log Message:
Update to 0.153000

Upstream changes:
0.153000  2014-10-23 23:45:36+02:00 Europe/Amsterdam

    [ ENHANCEMENT ]
    * Internal: Move the implementation of send_file from DSL to App.
      (Russell Jenkins)

    [ BUG FIXES ]
    * GH #634, #687: Fix file logger defaults.
      (Russell Jenkins, D.vid Kov.cs, Sawyer X)
    * GH #730: Make App use app-level config for behind_proxy. (Sawyer X)
    * GH #727: Disable regex metachars when calculating app location in tests
      (Gregor Herrmann)
    * GH #681, #682, #712: Clear session engine within destroy_session.
      (DavX, Russell Jenkins)
    * Ignore :tests in importing, don't suggest :script. (Sawyer X)

    [ DOCUMENTATION ]
    * GH #728: Typos in Policy document. (Olaf Alders, Sawyer X)