Remove workbook

Planning to replace workbook with a submodule.

Signed-off-by: Tanya Gray <tanyagray.nz@gmail.com>
Remove workbook

Remove workbook files from site folder.

Signed-off-by: Tanya Gray <tanyagray.nz@gmail.com>
Adding back workbook as a submodule

Workbook is now managed via penflip.com

Signed-off-by: Tanya Gray <tanyagray.nz@gmail.com>
Update navigation to match new workbook structure

Signed-off-by: Tanya Gray <tanyagray.nz@gmail.com>
Regenerated site files

Signed-off-by: Tanya Gray <tanyagray.nz@gmail.com>
Updated workbook metadata

Signed-off-by: Tanya Gray <tanyagray.nz@gmail.com>