Rework documentation

[berendsliedrecht]

• [x] Remove icons at headings
• [x] Make the logo a bit smaller (@blu3beri)
• [x] Add implemented and WIP features, with link to RFC if possible (@TimoGlastra)
• [ ] Add Introduction
• [x] Requirements -> Getting started with subheadings of NodeJS and React Native
• [x] Requirements for NodeJS
• [x] Requirements for React Native
• [ ] DEVREADME
  • [ ] Logging
  • [ ] Docker setup
  • [ ] Testing
• [ ] Gitbooks
• [x] Libindy setup
  • [x] Windows
  • [x] MacOS
  • [x] Linux ( Most popular distros)
  • [x] Android
  • [x] iOS

[TimoGlastra]

Features (WIP)

• ✅ React Native
• ✅ Node.JS
• ✅ Issue Credential Protocol (RFC 0036)
• ✅ Present Proof Protocol (RFC 0037)
• ✅ Connection Protocol (RFC 0160)
• ✅ Basic Message Protocol (RFC 0095)
• ✅ Indy Credentials (with did:sov support)
• ✅ HTTP Transport
• 🚧 Revocation of Indy Credentials
• 🚧 Mediator Coördination Protocol (RFC 0211)
• 🚧 WebSocket Transport
• ❌ Browser environments

I'm not sure where the following should be placed, but it may be useful to document what's not supported yet:

Full list of not yet supported features

- Issue Credential Protocol v2.0 ([RFC 0453](https://github.com/hyperledger/aries-rfcs/blob/master/features/0453-issue-credential-v2/README.md)) - Indy Credentials ([RFC 0592](https://github.com/hyperledger/aries-rfcs/blob/master/features/0592-indy-attachments/README.md)) - JSON-LD Credentials ([RFC 0593](https://github.com/hyperledger/aries-rfcs/blob/master/features/0593-json-ld-cred-attach/README.md)) - Present Proof Protocol v2.0 ([RFC 0454](https://github.com/hyperledger/aries-rfcs/blob/master/features/0454-present-proof-v2/README.md)) - Indy Credentials ([RFC 0592](https://github.com/hyperledger/aries-rfcs/blob/master/features/0592-indy-attachments/README.md)) - Presentation Exchange ([RFC 0510](https://github.com/hyperledger/aries-rfcs/blob/master/features/0510-dif-pres-exch-attach/README.md)) - DIDExchange Protocol ([RFC 0023](https://github.com/hyperledger/aries-rfcs/blob/master/features/0023-did-exchange/README.md))

[berendsliedrecht]

I'm not sure where the following should be placed, but it may be useful to document what's not supported yet:

I would say the same as Browser environments. Do we want to mention every item that is not supported or only the major items?