Adding support for tiny 2x2 machine

[dpetrisko]

This PR adds support for an even tinier 2x2 machine, which can fit in smaller FPGAs. In order to do this, there are a few changes:

• Change to mesh network
• Add parameterized support for wh_ruche_factor (1 for tiny, 2 normally)
• parameterized some hardcoded wh_ruche_factor loops
• added zero width replication for wh_cid calculation

[dpetrisko]

Thanks!