Notify admin of problems with data backend (bitcoind)

[akinsey]

• Notify Admin when either occurs
• Notify Admin if last block hasn't been updated in over (config amount of time)

[wtogami]

• Notify Admin when bitcoind has alerts.

[wtogami]

Baron config.js should have heckler config and e-mail address to e-mail the admin.

• Notify Admin of Invalid transactions.