message: fix minor mainpage issues
  better readability
  fixed environment
  fix indentation
diff: Welcome to the EOS.IO Documentation
  -----------------------------------
  -@note This documentation is in progress and subject to change due present rapid development. Please report inaccuracies identified to the [EOS.IO Developer Telegram Group](https://t.me/joinchat/EaEnSUPktgfoI-XPfMYtcQ) and/or open an issue on
  +@note This documentation is in progress and subject to change due present rapid development. Please report inaccuracies identified to the [EOS.IO Developer Telegram Group](https://t.me/joinchat/EaEnSUPktgfoI-XPfMYtcQ)
  ## EOS.IO
  - [EOS.IO Official Website](https://www.eos.io/)
  @@ -11,10 +11,13 @@ Welcome to the EOS.IO Documentation
  - [Telegram](https://www.eos.io/chat/)
  - [White Paper](https://github.com/EOSIO/Documentation/blob/master/TechnicalWhitePaper.md/)
  -## Building EOS.IO
  -- Environment Setup
  - - Automatic Build Script [Ubuntu 16.10](https://github.com/EOSIO/eos#autoubuntu) [macOS Sierra 10.12.6](https://github.com/EOSIO/eos#automac)
  - - Manual Build [Ubuntu 16.10](https://github.com/EOSIO/eos#ubuntu) [macOS Sierra 10.12.6](https://github.com/EOSIO/eos#macos)
  +## Environment Setup
  +- Automatic Build Scripts
  + - [Ubuntu 16.10](https://github.com/EOSIO/eos#autoubuntu)
  + - [macOS Sierra 10.12.6](https://github.com/EOSIO/eos#automac)
  +- [Manual Installation of Dependencies](https://github.com/EOSIO/eos#manualdep)
  + - [Clean Install Ubuntu 16.10](https://github.com/EOSIO/eos#ubuntu)
  + - [Clean Install macOS Sierra 10.12.6](https://github.com/EOSIO/eos#macos)
  - [Docker](https://github.com/EOSIO/eos/tree/master/Docker)
  ## End User
  @@ -28,10 +31,10 @@ Welcome to the EOS.IO Documentation
  ## Smart Contract Developers
  - [Introduction to Contract Development Tutorial](https://eosio.github.io/eos/md_contracts_eoslib_tutorial.html)
  +- [How to Deploy Smart Contracts](https://github.com/EOSIO/eos#accountssmartcontracts)
  - [Reference Introduction](https://eosio.github.io/eos/group__contractdev.html)
  -- [How to Deploy Example Smart Contracts](https://github.com/EOSIO/eos#accountssmartcontracts)
  - [RPC Interface](https://eosio.github.io/eos/group__eosiorpc.html)
  -- @ref contractdev
  +- API Reference
  - @ref database - APIs that store and retreive data on the blockchainEOS.IO organizes data according to the following broad structure
  - @ref mathapi - Defines common math function
  - @ref messageapi - Define API for querying message properties
  