add static ip to ping to make it easier to test on macosx
fix build with latest cohttp
Updated Makefiles to correctly detect current backend.
Updated .gitignore to correctly ignore generated files.
Updated iperf_self test to match the one in mirage-net.
Further simplified Makefiles: Added a basic Makefile that can be symlinked by further examples.
Added an Io_page test.
Added .xl files generated by Mirari to .gitignore.
Adapted the tcp test to mirari/DHCP.
[make] improve Makefile.config to detect net backend
[make] create a driver root Makefile
[make] improve root harness Makefile
[git] update gitignore to ocamlbuild targets only
[make] add `build` targets
[basic] hello world needs no network"