New upstream bugfix release 0.11.6

Binary package hint: sbackup

Please grant a Feature Freeze exception.

This is necessary as many bugs are being fixed in this upstream incremental bugfix release, in particular:

* removes 'backup upgrade' feature and 'rebase snapshot' feature which can cause *severe* user data loss.
* adds restore utility which provides legacy support using the 0.10.5 lgorithm to access backups created with old versions of this software.
* fixes a very annoying bug introduced in Saucy related to GtkFileChooserButton (see http://askubuntu.com/questions/159413/gtkfilechooserbutton-select-folder-mode-returns-no-path).
* fixes for some security related bugs, such as LP: #785512 Backup files are not protected from local user access: make the snapshot directories RWX only by owner and LP: #785495 to make the temp directory RWX only by owner instead of by all.
* many more bug fixes.

This package has been tested thoroughly and contains no flaws. It builds on Trusty, installs and upgrades. Testing was done by means of a PPA and locally, the upstream release is in public use since 09/2013.

Please find attached following documents:
* upstream changelog diff
* full build log on trusty buildd
* install log on trusty
* screenshot of GUI with replaced FileChooserButton
* screenshot of GUI of legacy-restore tool
* upstream release tarball, published at https://launchpad.net/sbackup/0.11/0.11.6/+download/sbackup_0.11.6.tar.gz
* source package version 0.11.6
* debdiff of source package 0.11.6 and package present in trusty (0.11.4)