[freeside] READMEs for migrating between 1.4.0 prereleases

[Dave Burgess]

I don't have a problem with removing these.

ivan wrote:

> There's "README.1.4.0pre2-3" and "README.1.4.0pre3-4" files in the
> distribution which contain information on upgrading between old
> prereleases (migrating from 1.3.1 is covered fully in
> httemplate/docs/upgrade8.html).  Unless someone speaks up who still needs
> them, I will be removing them from the distribution.
>
> --
> _ivan