Clean v4 docs

[jdevcs]

Investigate and implement following:

• Generate clean doc for following packages
  ( web3-eth, contract, accounts, wallet, personal, ens, iban, net, utils )

• Correct menu system for new generate doc

• Add new top menu link to new doc

• Update existing guides and tutorials doc links and structure

• Add missing documentation for:

• web3 eth main class intro

• update doc scripts with new plugin

[jdevcs]

• Add more description in each class exported
• in class desc add code examples of usign via web3 and directly importing and using
• check executable examples
• format return types
• remove following sections ( research any plugin )
• Hierarchy section
• Implements section
• Overrides section
• If source file link is not defined , remove following
• Defined in section
• individually see each package for any missing documented function that must be documented ( and is being filtered)
• like send and call functions in eth contract
• utils functions