PROPOSAL - more details for the user address field

Users integrating with our platform frequently (most of the time) attempt to update the address with a completely bohus value (like 'bla') not realising that we do a lookup with google and split the value into its components before saving.

As a bonus I have corrected our address postcode.

BEFORE

![screen shot 2013-10-21 at 9 17 18 am](https://f.cloud.github.com/assets/486512/1369222/dcdb008c-39dd-11e3-9279-27aaf29e0a69.png)

AFTER

![screen shot 2013-10-21 at 9 17 00 am](https://f.cloud.github.com/assets/486512/1369224/dffcab1c-39dd-11e3-8e88-cbf6c8276f0f.png)

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- [ ] @HelenRoss 
- [ ] @antfrew 
- [ ] kate
- [ ] dev