Pretty printer as a backend

[ManasJayanth]

Inspired by -dcmm option. Sample output

(program
    (((a = (dot (var joo_global_object) jsoo_runtime)))
        (call
            (0
                (etag 0 ((funexpr ((a) ((return (toint (+ 7 (var a)))))))))
                SomeFile))))

This can definitely be improved, but it's a start 🙂

PS: I wasn't sure which branch to raise the PR against

[jordwalke]

This is really great! I think it needs to be rebased on top of master though? Something is up with the commits.

[robz]

@prometheansacrifice this is really cool, and would be very useful for debugging! Would you like to rebase?

[ManasJayanth]

@robz Would you like to take it over? I can see that a lot of interesting changes have landed on master and it could take a while for me to resolve the conflicts

[ManasJayanth]

If not, I'll try in a few weeks

[robz]

I probably won't get to it in the next couple weeks, unless I encounter another difficult bug to fix. If I start I'll comment here