Update README with supported python version information. Fixes #24

README.md

@@ -1,4 +1,4 @@
-#pycapnp
+# pycapnp
 
 More thorough docs are available at [http://jparyani.github.io/pycapnp/](http://jparyani.github.io/pycapnp/).
 
@@ -35,6 +35,12 @@ Note: for OSX, if using clang from Xcode 5, you will need to set `CFLAGS` like s
 
     CFLAGS='-stdlib=libc++' pip install pycapnp
 
+## Python Versions
+
+Python 2.6/2.7 are supported as well as Python 3.2+. PyPy 2.1+ is also supported.
+
+One oddity to note is that `Text` type fields will be treated as byte strings under Python 2, and unicode strings under Python 3. `Data` fields will always be treated as byte strings.
+
 ## Development
 
 This project uses [git-flow](http://jeffkreeftmeijer.com/2010/why-arent-you-using-git-flow/). Essentially, just make sure you do your changes in the `develop` branch. You can run the tests by installing pytest with `pip install pytest`, and then run `py.test` from the `test` directory.
@@ -130,4 +136,3 @@ Means you haven't installed the Cap'n Proto C++ library. Please follow the direc
 
 
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