Abort if config file not found; add example file to usage (fix #14)
Merge branch 'master' into 14-config-file

Conflicts:
	lib/papertrail/cli.rb
Merge branch 'master' into 14-config-file
Change from aborting when config file not found to aborting when token not found
Remove unintentionally leftover extra 'end'
Merge pull request #16 from papertrail/14-config-file

Abort if config file not found; add example file to usage (fix #14)