Improve exit code reporting
Add comment
Fix general exception code
Fix tests
Update readme
Merge pull request #29 from appurify/error_codes

Improve exit code reporting
Bump version and add sdist
Fix bug where timeouts didn't properly report exit code 3
Merge pull request #30 from appurify/update-requirements

Update requirements
Merge branch 'master' into refactor

Conflicts:
	appurify/client.py