New: tables() and tables().nodes() methods for the new API:

- tables() is a table selector and iterator that most other API methods
  will likely use.

- tables().nodes() gets the selected HTML table nodes.

- Documentation of these functions is rather incomplete. Not yet sure
  how to fully document them. Currently thinking of having seperate
  documentation, a bit like jQuery, which can be a lot more involved,
  rather than building it fromt he doc comments which might get rather
  long (they already are!).