Move the 4.00.1 runtime into a separate subdirectory
Add 4.01.0 runtime and include headers
[xen] configure now symlinks in the right version at configure time
ocamlbuild doesnt follow symlinks, so readlink it and build the target explicitly
sync .gitignore to ignore symlinks
Note CHANGES
Add 4.01.0+xen to the Travis build matrix
remove ARM from the build matrix for the moment as it's a known-fail
Merge pull request #67 from avsm/xen-4.01.0

OCaml 4.01.0 support for Xen