rename to version-ext-compat because pyenv-version-ext must precede

than compatibility plugin.

plugins/version-ext-compat/README.md

@@ -0,0 +1,67 @@
+# pyenv-version-ext
+
+pyenv-version-ext is a [pyenv](https://github.com/yyuu/pyenv) plugin
+that provides a `pyenv push` and `pyenv pop` commands to manage Python
+versions.
+
+(NOTICE:
+This project has been moved out as external plugin of pyenv.
+The version-ext-compat has left for backward compatibility, but will be removed from future release of pyenv.
+See also [pyenv-version-ext](https://github.com/yyuu/pyenv-version-ext).)
+
+## Installation
+
+### Installing as an pyenv plugin
+
+Installing pyenv-version-ext as a pyenv plugin will give you access to the
+`pyenv push` and `pyenv pop` commands.
+
+    $ git clone git://github.com/yyuu/pyenv-version-ext.git ~/.pyenv/plugins/pyenv-version-ext
+
+This will install the latest development version of pyenv-version-ext into
+the `~/.pyenv/plugins/pyenv-version-ext` directory. From that directory, you
+can check out a specific release tag. To update pyenv-version-ext, run `git
+pull` to download the latest changes.
+
+## Usage
+
+You can manage your version stack by `pyenv push` and `pyenv pop`.
+
+    $ pyenv global
+    2.7.5
+    3.2.5
+    $ pyenv push 3.3.2
+    $ pyenv global
+    2.7.5
+    3.2.5
+    3.3.2
+    $ pyenv pop
+    2.7.5
+    3.2.5
+
+The push/pop operation is also efective for local and shell versions.
+
+### License
+
+(The MIT License)
+
+* Copyright (c) 2013 Yamashita, Yuu
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.