Update docs for 0.2.1 release.

doc/_posts/2013-08-19-capnproto-0.2.1.md

+---
+layout: post
+title: "Cap'n Proto v0.2.1: Minor bug fixes"
+author: kentonv
+---
+
+Cap'n Proto was just bumped to v0.2.1.  This release contains a couple bug fixes, including
+a work-around for [a GCC bug](http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58192).  If you were
+observing any odd memory corruption or crashes in 0.2.0 -- especially if you are compiling with
+GCC with optimization enabled but without `-DNDEBUG` -- you should upgrade.

doc/install.md

@@ -94,9 +94,9 @@ Hopefully, Xcode 5.0 will be released soon with a newer Clang, making this extra
 
 You may download and install the release version of Cap'n Proto like so:
 
-<pre><code>curl -O <a href="http://capnproto.org/capnproto-c++-0.2.0.tar.gz">http://capnproto.org/capnproto-c++-0.2.0.tar.gz</a>
-tar zxf capnproto-c++-0.2.0.tar.gz
-cd capnproto-c++-0.2.0
+<pre><code>curl -O <a href="http://capnproto.org/capnproto-c++-0.2.1.tar.gz">http://capnproto.org/capnproto-c++-0.2.1.tar.gz</a>
+tar zxf capnproto-c++-0.2.1.tar.gz
+cd capnproto-c++-0.2.1
 ./configure
 make -j6 check
 sudo make install</code></pre>