Summary:
Adding documentation for the CLI for 2 reasons:
1. It's not immediately clear to most how the CLI is part of `react-native` and not the node module they installed. This begins clarifying.
2. I plan on adding some additional documentation to this section pending an upcoming PR I've discussed with Mike.
screen shot provided:

Closes https://github.com/facebook/react-native/pull/11097
Differential Revision: D4237028
Pulled By: mkonicek
fbshipit-source-id: c1dc50fe1be7f6947a33ee6472b5862306888055
Summary:
Updating the RN version 0.31, so that doc is also upto date with latest version.
Closes https://github.com/facebook/react-native/pull/9247
Differential Revision: D3677606
fbshipit-source-id: 8ec5999dfaa243377d85a533935ccfe2d4c97fae
Summary:
We had rendering support for prev links, but we never had any previous links in our metadata. Only next links. This adds that support to both Guides and APIs.
**For guides**: `previous` is manually inserted into the metadata of the actual markdown file.
**For APIs/Components**: `previous` is established via code within `extractDocs.js`
> This isn't totally perfect. For example, the transition from the last guide to the first API/component has a next link from the guide, but not a previous link from the API since the way you get the previous links are different from guides and APIs. But this gets us really close.
Closes https://github.com/facebook/react-native/pull/8754
Differential Revision: D3557972
Pulled By: hramos
fbshipit-source-id: e270bb51e7a4f59f61dad28ae0928d27d0af3d4a
Summary:
Just updating the docs as .18 is quite old :)
Closes https://github.com/facebook/react-native/pull/7824
Differential Revision: D3371417
Pulled By: javache
fbshipit-source-id: 91b8249f814eeef68cbeff4b481624644dc7be73