add release announcement for 2.1.2

doc/announce/index.txt

@@ -5,6 +5,7 @@ Release announcements
 .. toctree::
    :maxdepth: 2
 
+   release-2.1.2
    release-2.1.1
    release-2.1.0
    release-2.0.3

doc/announce/release-2.1.2.txt

@@ -0,0 +1,33 @@
+py.test 2.1.2: bug fixes and fixes for jython
+===========================================================================
+
+pytest-2.1.2 is a minor backward compatible maintenance release of the
+popular py.test testing tool.  pytest is commonly used for unit,
+functional- and integration testing.  See extensive docs with examples
+here:
+
+     http://pytest.org/
+
+Most bug fixes address remaining issues with the perfected assertions
+introduced in the 2.1 series - many thanks to the bug reporters and to Benjamin
+Peterson for helping to fix them.  pytest should also work better with
+Jython-2.5.1 (and Jython trunk).
+
+If you want to install or upgrade pytest, just type one of::
+
+    pip install -U pytest # or
+    easy_install -U pytest
+
+best,
+holger krekel / http://merlinux.eu
+
+Changes between 2.1.1 and 2.1.2
+----------------------------------------
+
+- fix assertion rewriting on files with windows newlines on some Python versions
+- refine test discovery by package/module name (--pyargs), thanks Florian Mayer
+- fix issue69 / assertion rewriting fixed on some boolean operations
+- fix issue68 / packages now work with assertion rewriting
+- fix issue66: use different assertion rewriting caches when the -O option is passed
+- don't try assertion rewriting on Jython, use reinterp
+