Add a way to see burning/minting transactions history in the admin view.

[whysthatso]

it would be neat to have a very simple history view:

• admin x minted shares for user y
• admin x burnt shares of user y

[osarrouy]

This was not part of the original specifications so won't be included in v1. I keep it open as a reminder for v2.

Though I'm not sure this is a good idea as this may clutter the interface while being redundant with interfaces provided by Etherscan: in case their is some 'malicious' burning there is always a way to check on Etherscan and figure out who did initiate the malicious transactions.

Anyhow let's discuss this when time comes to work on v2.