Added 1.7 release announcement.

ANNOUNCE.1.7

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+GNUstep Objective-C Runtime 1.7
+===============================
+
+This is a point release to the eighth official release of the GNUstep
+Objective-C runtime (a.k.a.  libobjc2).  This runtime was designed to support
+the features of modern dialects of Objective-C for use with GNUstep and other
+Objective-C programs.  Highlights of this release include:
+
+- A new CMake-based build system.  This makes all of the configurable options
+  available via a clean interface.  CPack is supported for building RPM and DEB
+  packages out of the box.
+
+- A new CTest-based test suite, replacing the old ad-hoc tests.
+
+- Build a single libobjc with support for Objective-C++ on platforms where a
+  C++ ABI library (libcxxrt or libsupc++) is installed as a shared library.
+
+- Added specialised property accessor functions and support for atomic
+  properties with C++ non-POD types.
+
+- Significant improvements in property introspection and an exhaustive test
+  suite.
+
+- Improved integration with libdispatch.  The runtime will correctly register
+  work queues with the garbage collector or create autorelease pools around
+  block invocations.
+
+- A new exception implementation providing better integration with foreign
+  exceptions (e.g. C++ exceptions).  The new ABI is supported by clang 3.3 when
+  compiling with -fobjc-runtime=gnustep-1.7 (or higher).  The old ABI is still
+  supported and both can be used within the same program, however code compiled
+  with the old ABI remains unreliable in the presence of foreign exceptions.
+  It is strongly recommended that anyone using exceptions with Objective-C++
+  switches to the new version.
+
+- MIPS64 support in the assembly routines.  Currently these are only tested
+  with the n64 ABI.  They are believed to work with n32 and o32, but should be
+  considered unsupported on these platforms.
+
+- Small algorithmic improvement to the objc_msgSend() implementation, giving
+  approximately a 10% speedup (architecture-dependent) on message sends.
+
+- Updated optimisation passes to work with LLVM 3.2 and recent LLVM trunk.
+
+
+You may obtain the code for this release from subversion at the following
+subversion branch:
+
+svn://svn.gna.org/svn/gnustep/libs/libobjc2/1.7
+
+Alternatively, a tarball is available from:
+
+http://download.gna.org/gnustep/libobjc2-1.7.tar.bz2
+
+The runtime library is responsible for implementing the core features of the
+object model, as well as exposing introspection features to the user.  The
+GNUstep runtime implements Apple's Objective-C Runtime APIs, and a small number
+of GCC APIs for legacy compatibility.
+
+This library is based on the Étoilé Objective-C Runtime, an earlier research
+prototype, and includes support for non-fragile instance variables,
+type-dependent dispatch, and object planes.  It is fully backwards compatible
+with the FSF's GCC 4.2.1 Objective-C ABI and also implements a new ABI that is
+supported by Clang and Étoilé's LanguageKit and is required for some of the
+newer features.
+
+If you come across any problems, please report them to the GNUstep Developer
+mailing list <gnustep-dev@gnu.org>.