Updates to testing system

[equwal]

I did three things:

1. I added a macro called tests which reduces a lot of boilerplate. Essentially:

(test predicate1)
(test predicate2)
(test predicate3)

Can now be written

(tests predicate1 predicate2 predicate3)

Macros are fun.

2. I decided to go through and collect broken tests that are commented out into their own file, at which point I realized I could run them and see if any worked now.
3. Several of them did indeed work, so I put them back in.

All this because I realized I would have to write test twice instead of once.
#309

[equwal]

Accidentally removed some tests, will be back.

[equwal]

#323