> 5.Cool, I will take a look at them, I haven't been too sure on save options. The initial idea was that developers wanted to save something they could then send to a PM who could load the same thing make changes and maybe send back.

To me (and I am no usability expert so, ya know, 'grain of salt' and all that), this sounds more like an "Export" operation than a "Save" operation. I agree with the parent that localStorage or IndexedDB would be good, and combining one of them with auto-save would be even better. Perhaps the 'Save' button in the menu could then be changed to 'Export' or something?

EDIT:

Also, the use of localStorage could make this 'todo' from the README partly obsolete:

  > online persistence if there was demand. this does however mean accounts which isn't cool but maybe the notion of guest accounts and persistent accounts whereby multiple boards could be saved.

LocalStorage wouldn't enable a user to get their boards from anywhere, but could help, as the parent says, with the 'oops i closed my browser' case.