Added --provider-options KEY1=VAL1,KEY2=VAL2 support. …
Using --provider-options region=us-west-1 suppresses warnings and intermittent exconn failures.
Also I think it is a little more friendly to just puts the error and exit 1, instead of throwing a bracktrace.
Merge pull request #3 from caryp-contrib/provider_options

Added --provider-options KEY1=VAL1,KEY2=VAL2 support.