Add release notes file

The idea is that the release announcement for the upcoming version of
StGit is prepared here. That way, the work of putting it together and
polishing it can be shared.

The text added by this patch was taken verbatim from the v0.15-rc1
announcement that Catalin posted to the git mailing list on July 12,
2009. The patch adding it to StGit (including this commit message) is
by Karl Wiberg <kha@treskal.com>.

diff --git a/RELEASENOTES b/RELEASENOTES
new file mode 100644 (file)
index 0000000..92389f0
--- /dev/null
+++ b/RELEASENOTES
@@ -0,0 +1,33 @@
+Stacked Git 0.15-rc1
+--------------------
+
+The first release candidate for StGit 0.15 is available from the
+git://repo.or.cz/stgit.git or http://download.gna.org/stgit/. Bugs can
+be reported on the Git mailing list or via the project bugs page
+(https://gna.org/bugs/?group=stgit).
+
+StGit is a Python application providing similar functionality to Quilt
+(i.e. pushing/popping patches to/from a stack) on top of Git. These
+operations are performed using Git commands and the patches are stored
+as Git commit objects, allowing easy merging of the StGit patches into
+other repositories using standard Git functionality.
+
+The main changes since release 0.14.3 (I may miss some important
+features but they can be found in the log):
+
+- New core infrastructure for repository operations
+- Infinite undo/redo operations and corresponding commands
+- Automatic reverting of changes following a failed operation (using
+  transactions)
+- New 'squash' command for combining two or more patches into one
+- New 'publish' command for maintaining merge-friendly branches (which
+  are not rebased)
+- New patch identification format - <branch>:<patch> (see 'id'
+  command)
+- UI improvements and removal of the 'add', 'rm' and 'resolved'
+  commands since there are corresponding Git equivalents
+- Emacs mode improvements
+- Man pages and improved tutorial
+
+Special thanks go to Karl Hasselström for the hard work done on the
+new StGit features.