The "zigzag" argument is handy to create daisy-chained grids, but what
if we want to start from the other side? I don't think rotation gets us
there, but this does.

for n in `find . -name OPC.pde`; do cp template/OPC.pde $n; done

for n in `find . -name OPC.pde`; do cp template/OPC.pde $n; done

Replace deprecated registerDraw with registerMethod. Call sleep statically.

When using multiple OPC connections, prevents disconnected server(s)
from stalling the client.

New READMEs for the examples, and update everything for the new layoutful naming convention.