added more tests to the ISA -- covers all the instructions except RST
(reset).
fixed a bug in the ISA -- when comparing two numbers, we really compared
their pointers. in C, it's the difference between
```
int a = 10;
int b = 12;
int *ap = &a;
int *bp = &b;
if (ap < bp) { /* do stuff */ }
```
the problem is that you're comparing the pointers, *not* the values they
refer to. it instead should be like
if (*ap < *bp) { /* do stuff */ }
because you need to *dereference* the value before comparing. that's
what happens in cli/data/computer.py now.
relocated everything in its own module, `cli`, and split the server code
such that it's more component based, if you will
also, added a working test suite, which is somewhat exciting.
