Log Message:
Update duplicity to 0.6.25.

Changes from previous:

New in v0.6.25 (2014/10/20)
---------------------------
Enhancements:
* Add deprecation warning for 0.6 series
* Merged in lp:~ed.so/duplicity/0.6-dpbx.importfix
  - fix this showstopper with the dropbox backend
    "NameError: global name 'rest' is not defined"
* Merged in lp:~jflaker/duplicity/BugFix1325215
  - The reference to "--progress_rate" in the man page as a parameter is
    incorrect. Should be "--progress-rate".
* Merged in lp:~hooloovoo/duplicity/updated-README-REPO
  - Changes to README-REPO to reflect the restructuring of the directories.
* Fixed bug 1375304 with patch supplied by Aleksandar Ivanovic
* Merged in lp:~ed.so/duplicity/webdav200fix-0.6
  - webdav backend fix "BackendException: Bad status code 200 reason OK. \ 
" when
    restarting an interrupted backup and overwriting partially uploaded volumes.
* Merged in lp:~antmak/duplicity/0.6-par2-fix
  - Useful fix for verbatim par2cmdline options (like "-t" in par2-tbb \ 
version)
* Merged in lp:~jon-haggblad/duplicity/ftps-fix
  - Minor bugfix for ftps backend where lftp needs host prefixed by \ 
"ftps://".
* Fixed bug 1327550: OverflowError: signed integer is greater than maximum
  - Major and minor device numbers are supposed to be one byte each.  Someone
    has crafted a special system image using OpenVZ where the major and minor
    device numbers are much larger (ploop devices).  We treat them as (0,0).
* Merged in lp:~jon-haggblad/duplicity/ftps-fix (2nd try)
  - Minor bugfix for ftps backend where lftp needs host prefixed by \ 
"ftps://".
* Merged in lp:~johnleach/duplicity/1315437-swift-container-create
  - Check to see if the swift container exists before trying to create it,
    in case we don't have permissions to create containers. Fixes #1315437