v0.1 - Hello tiny tabled world!

The first release.

This provides a TinyTableBlock StreamField block.
The table data is saved in JSON-serialised dict:

{
   "headers": [],
   "rows": [],
   "html": sanitised_html
}

headers / rows are lists of lists of cell values. Each cell being a dict with the following keys

key	value notes
value	The cell value
type	"td" or "th"
rowspan	if set
colspan	if set
scope	if set
align	if set