Merge pull request #70 from plone/khink-virtualenv

Update intro.rst: Use virtualenv for bootstrapping.

docs/intro.rst

@@ -29,11 +29,11 @@ The first step in fixing a bug is getting this `buildout <https://github.com/plo
 To set up a plone 5 development environment::
 
   > cd ~/buildouts # or wherever you want to put things
-  > git clone -b 5.0  https://github.com/plone/buildout.coredev ./plone5devel
+  > git clone -b 5.0 https://github.com/plone/buildout.coredev ./plone5devel
   > virtualenv --no-site-packages plone5devpy
   > cd plone5devel
-  > pip install -r requirements.txt
-  > buildout bootstrap
+  > ../plone5devpy/bin/pip install -r requirements.txt
+  > ../plone5devpy/bin/buildout bootstrap
   > bin/buildout -v
 
 If you run into issues in this process, please see the doc :doc:`issues`.