Readme update (ongoing)

[VirtualDOMinic]

Up to 30mins each day for us all to update the readme

[MissArray]

Merge our hack.md project notes into a single file documenting our progress? Currently there is the original one:
https://hackmd.io/qRxysSPSSzmDoM1GB-BIVg#
and the one Kate made:
https://hackmd.io/KODpGBJ4TN-yXT46eBDaJg?both

[VirtualDOMinic]

Starting to work on readme here on hackmd, then can paste it into our repo's readme!

https://hackmd.io/sGyzygeYQmCIdZgQBJRC_Q

Will use Kate's stuff to inform it!