Make examples in quickstart all work.

When creating the table in the 'Storing data' section the table created
was called 'person', rather than 'user' making the other examples not
work because 'user' was referred to rather than 'person'.

I added countries to the entered data so that later queries in the
quickstart return some data.

I changed examples of returned data in 'Inspecting databases and tables'
match what is actually returned.

In 'Reading data from tables' I make the examples return real data.
Merge pull request #80 from ode79/make_quickstart_examples_work

Make examples in quickstart all work.