Merge pull request #22 from titanous/fix-zombies

Wait on the child pid during the last step of Double

Fix #21.

Stanardize on log.Println.

Update README to reference new examples.

Support the old API in terms of the new one.

More explanatory comments in example/double.

Rename strategies to Single and Double.

Working and tested inherit-exec.

Progress: infinite loop.

WIP

s/AwaitSignals/Wait/

s/Relaunch/ForkExec/

WIP

Rename.