Add note about master branch to readme.
|@@ -31,6 +31,10 @@ can just run `lein self-install`, otherwise get the standalone jar from the|
|If you have [Cygwin](http://www.cygwin.com/) you should be able to use|
|the shell script above rather than the batch file.|
|+The master branch is currently undergoing massive changes for|
|+Leiningen 2.0; you should not expect it to work. If you want to build|
|+from source for everyday use, use the 1.x branch.|