Change issuer on record

This is a pulled back version of Smart Property Administration allowing for the rotation of issuer address for long lasting crowdsales and manually issued properties.

These properties live long enough that good security practices would require the address which possesses administrative power to rotate and stay fresh.

This does not preclude a future more fully featured SP administration layer, as any system would necessarily need to allow a change of issuer. 

NOTE: there is one omission in the revoke manual issuance transaction where the wording was not changed to respect the issuer on record.  This is because PR #256 removes that clause entirely and I did not want to cause merge conflicts