fix up tests and expand-file a bit better.
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.
add faking multiple files
note
fix typo.
update the file faking with correct func sigs and note README