Add additional example of table with online markdown table generator

eg https://www.tablesgenerator.com/markdown_tables

and (example from website above): 

| Tables   |      Are      |  Cool |
|:----------|:-------------:|------:|
| col 1 is |  left-aligned | $1600 |
| col 2 is |    centered   |   $12 |
| col 3 is | right-aligned |    $1 |