Pip install to user homedir
This change passes --user to pip install, so that it installs packages
underneath the home directory.  This is required because, except for the
"python" image in Travis, all Python and Pip-related directories are
root-owned.  The --user approach avoids needing to sudo all over the place.
@@ -8,7 +8,7 @@ GOMETALINTER := ${GOMETALINTERBIN} --config=../../Gometalinter.json
include ../../build/common.mk
ensure::
- pip install -r requirements.txt
+ pip install --user -r requirements.txt
lint::
pylint -E lib/pulumi/ --ignore-patterns '.*_pb2_.*.py'
