Added section on botfile saving and sharing.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
README.md: Added a note about using one-ticker-multple-bots with dump file saving/sharing.

Signed-off-by: Martin Stone <martin@d7415.co.uk>
README.md: Standardised all merlin paths to "/path/to/merlin".

Signed-off-by: Martin Stone <martin@d7415.co.uk>