two files named `path.v`

[affeldt-aist]

We should have noticed that earlier but there are now
two path.v files (in homotopy_theory and in ssreflect)
that cause a conflict when doing From mathcomp Require Import.
We may want to rename the one in MathComp-Analysis...

[affeldt-aist]

What about homotopy_path.v ? @zstone1

[zstone1]

Or 'continuous_path' . I'm fine with either.