switch to using fakir-file instead of make-fakir-file
specify the home-root using the dynamic variable
file-exists-p is a bit simpler than it used to be.
expand-file-name is not quite what we had.
fakir-mock-file is just fakir-faked-file
better doc
bump the version
update the README with more info
require noflet
switch from an aliasing macro to an alias.