* [x] Figure out the weird opAmp behavior
* [x] Design cell with strict metal policies
* [x] Add precharger version of memory cell (or explain how they compose)
* [x] Test cell in the _middle_.
* [x] Walk through the consequences of the read/write block being in the middle.
* [x] Figure out what to do with flopped write block.
* [ ] Test data close to write block (it pulls up past clock low!)
* [ ] Drive wires to zero?