Birthday

Move from baseworker-go and set up as its own repo.
@rgarcia `make release` fails with this error:

```bash
clever/dev/gearcmd (birthday) $ make release
GOARCH=amd64 GOOS=darwin go build -o "build/gearcmd-v-darwin-amd64/gearcmd"
can't load package: package .: no buildable Go source files in /Users/jonahkagan/Documents/clever/dev/gearcmd
make: *** [build/gearcmd-v-darwin-amd64] Error 1
```