Make matrices all same size

All user's matrices are now the same size, based on the cutoff size
enforced.

For some reason this has made execution nearly 100x slower, and the
generated file about 40x bigger. Sometimes it will randomly use the
wrong number of topics, so i have hard coded a number of topics in
(there doesn't seem to be any intention to do more than 10).

The last user in the generated file almost always fucks up. I don't know
how to fix this and it would take more time than I care to devote.