Fix die and hello scripts

Closes #3

- Remove duplicate hello script causing repetitious replies
- Add back in the die command
Merge pull request #4 from jgable/fixDie

Fix die and hello scripts
Add github issue lookup

Closes #2

- Add ghost-issues script that uses Github public issue lookup API
Merge pull request #5 from jgable/ghostIssues

Add github issue lookup
Merge branch 'master' of github.com:TryGhost/Slimer