Add warning about where sourcing the virtualenvwrapper should go
Diff
1diff --git a/README.rst b/README.rst
2index f41b960cab62d00cd3fdc75ba6498c07b471359e..6c81449af0895c5b078b848f1ccaa5a99f30cb31 100644
3--- a/README.rst
4+++ b/README.rst
5@@ -49,6 +49,9 @@ setup. This should work:
6 7 source =virtualenvwrapper.sh
8 9+Make sure this is put *before* your package manager loading code (i.e. the
10+line of code discussed in the section that follows).
11+
12 Installing with ZSH Package Managers
13 ------------------------------------
14