Use the wp-cli.org recommended URL for WSUWP provisioning

We may still be able to restrict this based on the grep that we do
for version.
Use the wp-cli.org recommended URL for WSUWP-Indie provisioning
Grep for wp-cli 0.14.1 in WSUWP Indie provisioning
Merge pull request #86 from washingtonstateuniversity/wp-cli

[PR] Update the URL used to provision wp-cli