Typedoc generated docs

[alcuadrado]

This PR fixes #95, updating the docs to be compatible with the ethereumjs-config setup.

It mostly moves the docs from the README.md to the sources, with some formatting changes.

Note I didn't find places where the doc was outdated, but I'm not that familiar with this library yet, so I may have missed something.

Finally, I'm not sure how to document Blockchain.prototype.db, Blockchain.prototype.dbManager, and Blockchain.prototype.ethash. I suspect they should have been private fields. Apart from that, it is ready for review.

[alcuadrado]

Oops, my bad. I didn't realized that those new privates were actually changing the code, and not just docs.

Some tests broke because of this. They were using private APIs, so I'm not sure what's the best way to move forward.

The easiest way of fixing this is to make things public again, and ignore them with the @hidden tsdoc tag.

[alcuadrado]

The easiest way of fixing this is to make things public again, and ignore them with the @hidden tsdoc tag.

I went ahead and implemented this to keep this PR small.

[holgerd77]

Great thanks, together with the TS update from @whymarrh really a milestone for this library, will directly prepare some release PR so that we can get this out! 😀

Some notes:

• This large inlined doc comment on the constructor should be broken down and especially the opts dict described by annotation tags, the deprecation note can probably be dropped
• This hidden tagging is not so beautiful and bloats the code especially on private variables, we should eventually dig deeper if this can be alternatively addressed

Both no blockers though, we can handle in subsequent PRs iteratively.

[holgerd77]

Some other notes:

• we should eventually extract the example again to the main readme, think this is more friendly and makes the library more approachable
• There is still Constantinople referenced as latest HF option in the constructor, this should be updated to Petersburg

[holgerd77]

(these can also be addressed later/separate)