Add note about DRG key.
SUBMODULES???!!?
Merge pull request #311 from rgbkrk/deployment_plus

[WIP] Deployment instruction updates, further automation
External links open in different window
Consistent SDK ordering
Merge pull request #314 from everett-toews/consistent-sdk-order

Consistent SDK ordering
Merge pull request #313 from everett-toews/link-targets

External links open in different window