[editor] Update SQL examples to demo features

Some ideas:

3.12 Promote variables and timeline/pivot option

1. Customer notebook should have the zipcode parameterized e.g. picture
2. Maybe group query#3 on 'ords.order_date' only and either find a way to have 'timestamp' type in the customer table for 'order_date' or casting in query 'SELECT cast(unix_timestamp('2014-01-05T00:00:00', "yyyy-MM-dd'T'hh:mm:ss") * 1000 as TIMESTAMP) from sample_07 limit 5'
3. Maybe add a 4th query to promote pivot (pivot on product type through time?)
4. There is a new heatmap too
5. ALTER TABLE jobs ADD COLUMNS (ts TIMESTAMP) / 2013-03-12 00:00:00

4.0

1. Aggregate the 3 Sample 07 into one
2. Investigate if we could have the same for notebook (if we show the notebook mode)