feat(updateengine): basic are working
feat(lock): Initial passing tests
feat(README) rename and improve descriptoin
feat(main): initial set-max working along with init

This now works:

```
./focaccia set-max 8
```

```
etcdctl get /coreos.com/updateengine/rebootlock/sempahore
{"semaphore":8,"max":8,"holders":null}
```
feat(main): Initial help
chore(gitignore): ignore focaccia
feat(main): return old value when calling set-max
feat(main): lock/unlock now work
chore(focaccia_test): remove this broken test
fix(lock): fixup the lock tests
chore(*): gofmt -s -w -l