Also bump the python bindings version, the NEWS version and the Debian
version.
Since the changelog is (slightly dubiously) metadata, we have to
change it to upload a release candidate.
-Notmuch 0.18.1 (2014-06-25)
-===========================
+Notmuch 0.18.1~rc0 (2014-06-22)
+===============================
This is a bug fix and portability release.
# this file should be kept in sync with ../../../version
-__VERSION__ = '0.18'
+__VERSION__ = '0.18.1~rc0'
-notmuch (0.18.1-1) unstable; urgency=medium
+notmuch (0.18.1~rc0-1) experimental; urgency=medium
* New upstream bug fix release
* Tighten dependence of python packages on libnotmuch