Making install messages more verbose

During installation, we only send error messages to stdout. Specifying this now in the messages that are printed during installation.

.setup_dev.sh

@@ -28,9 +28,11 @@ if let "${pipversion[0]}<${MINIMUM_PIP_VERSION}"; then
 fi
 
 echo "Installing package and runtime dependencies in local environment"
+echo "This might take a few minutes. Only errors will be printed to stdout"
 python -m pip install -e . > /dev/null
 
 echo "Installing developer dependencies in local environment"
+echo "This might take a few minutes. Only errors will be printed to stdout"
 python -m pip install -e .'[dev]' > /dev/null
 if [ -f docs/requirements.txt ]; then python -m pip install -r docs/requirements.txt; fi