Extend the documentation (continuous task)

[csmuller]

External docs:

• [ ] Mention the behavior of equals and == after implementation of #517.
• [x] Add explanations of the convenience classes and methods that neow3j provides (e.g., all the SmartContract subclasses)
• [ ] Extend the "Devpack" section.
• [x] Add links to the online Javadocs of the core and contract modules to the dApp development sections.
• [ ] Add a section on updating deployed smart contracts.
• [ ] Create a table of supported Java language features similar to boa.
• [ ] Explain why POJOs used in smart contracts should have public field variables and not getters and setters.

Javadocs:

• [ ] Document all devpack annotations.
• [ ] Document the event classes and interface in the devpack.

[gsmachado]

@csmuller should we turn some of these tasks into specific issues?

Or can we review this issue to check what's done and what's still "missing"?

[csmuller]

I will work on this today (clean up the docs where necessary and extend where possible with little effort) and update this issue afterwards.

[gsmachado]

I will work on this today (clean up the docs where necessary and extend where possible with little effort) and update this issue afterwards.

Great! 💪