convert changelog to Debian's format

CHANGELOG

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+debian/changelog

debian/changelog

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+pandoc-citeproc-preamble (1.2.3) UNRELEASED; urgency=medium
+
+  * Convert changelog to Debian's format.
+
+ -- Sean Whitton <[email protected]>  Sun, 29 Jan 2017 11:00:07 -0700
+
+pandoc-citeproc-preamble (1.2.2) unstable; urgency=medium
+
+  * Delete LTS Haskell cabal.config.
+
+    pandoc-citeproc-preamble is tested and working with pandoc 1.19 and
+    pandoc-citeproc 0.10.3.  However, to use these versions, you need to
+    compile pandoc-citeproc-preamble against pandoc-types 1.17.  The
+    existing cabal.config was making that more difficult.
+
+ -- Sean Whitton <[email protected]>  Thu, 22 Dec 2016 13:54:00 +0000
+
+pandoc-citeproc-preamble (1.2.1) unstable; urgency=medium
+
+  * Bump version in pandoc-citeproc-preamble.cabal.
+  * Bump resolver in README.md.
+
+ -- Sean Whitton <[email protected]>  Thu, 10 Nov 2016 09:48:40 -0700
+
+pandoc-citeproc-preamble (1.2.0) unstable; urgency=medium
+
+  * Bump LTS Haskell version to 7.8.
+
+ -- Sean Whitton <[email protected]>  Thu, 10 Nov 2016 09:45:19 -0700
+
+pandoc-citeproc-preamble (1.1.0) unstable; urgency=medium
+
+  * Bump LTS Haskell version to 5.4 by means of cabal.config file.
+    This should fix SoftBreak errors.
+  * Don't insert a preamble if pandoc-citeproc inserted no bibliographic
+    entries.
+
+ -- Sean Whitton <[email protected]>  Tue, 23 Feb 2016 20:50:34 -0700
+
+pandoc-citeproc-preamble (1.0.0) unstable; urgency=medium
+
+  * Initial release.
+
+ -- Sean Whitton <[email protected]>  Sat, 26 Sep 2015 22:18:00 -0700

pandoc-citeproc-preamble.cabal

@@ -1,5 +1,5 @@
 name:                pandoc-citeproc-preamble
-version:             1.2.2
+version:             1.2.3
 synopsis:            Insert a preamble before pandoc-citeproc's bibliography
 description:         Please see README.md
 homepage:            https://github.com/spwhitton/pandoc-citeproc-preamble