v0.2.0 - refactor to use fog-softlayer; add features: VLAN, GLOBAL IP, DATACENTER, FIX TAGS

Add support for Global IP address list.

Add support for datacenter show and list.

Refactor to use fog-softlayer instead of deprecated softlayer_api gem.

Add --private-network-only and --image-id support.

Add support for --from-file JSON config.

Add support for listing compute images.

Add support for listing compute images.

Fix failing tests after refactor.

Actually add tags to chef node.  Always tag chef node with the SL compute instance id.

Refactor server destroy.

Fix failing test.

Fix dependencies.