Work around Launchy-related failure when creating an account.
Fix invoking the preseed script.

OK, there were a typo and a missing x bit.
Fix initial setup of ansible-related dependencies on the client.

We initially don't even have python available, so the first step would
actually be to install python, without requiring python.
Ensure we install the latest go version from Bearstech

The Wheezy version is Go 1.0 which is too old for the go-httpclient
version used when installing img-LinuxFr.org.
Generate the ruby-env file in the ruby2 tasks.
Fix ruby environment handling so gems are installed in $HOME/gems