deleted old build infrastructure
Added oasis build scripts

Need oasis
ignore stuff
result of oasis setup

These files were auto-generated from the `_oasis` file. Seems customary to add
these to the repo, instead of requiring everyone to have oasis installed.

The Makefile should "just work". If you only edit an existing module, nothing
needs to change. However, if you need to create a new module or otherwise
tweak the _oasis file, you'll need to get oasis:

    opam install oasis

Then, rebuild these files:

    oasis setup