gitignore pycs and pycache
Test for single Process run
A first cut of a single process run
test data directory for commands to work in
handle nonzero return codes
handle case where stdout is the empty string
mv test_procs to test_process.py
First cut of chain tests
First (broken) attempt at chain implementation
Working pipey chain, woo.
add repr to proc
Remove some unused attributes
Move things around into a module
Implement module-level run fn as per README
Implement .ok as per README
Update README for | syntax of chains