Bump to pip 1.4

This will likely be a sticking point, however for our development environments
we need pip 1.4+ to properly compile things.  This patch first installs the
system version, then upgrades pip to 1.4 from pypi.

Change-Id: I7b05406cdfc2d9cd002cdeca04b07434ae27caca
Signed-off-by: Paul Belanger <paul.belanger@polybeacon.com>