upip: Add shell script to bootstrap upip from PyPI.

upip/bootstrap_upip.sh

@@ -0,0 +1,13 @@
+# This script performs bootstrap installation of upip package manager from PyPI
+# All the other packages can be installed using it.
+
+# Remove any stale old version
+rm -rf micropython-upip-*
+wget -nd -r -l1 https://pypi.python.org/pypi/micropython-upip/ --accept-regex ".*pypi.python.org/packages/source/.*.gz" --reject=html
+
+tar xfz micropython-upip-*.tar.gz
+mkdir -p ~/.micropython/lib/
+cp micropython-upip-*/upip*.py ~/.micropython/lib/
+
+echo "upip is installed. To use:"
+echo "micropython -m upip --help"