Add Details property to tests

[philipbeadle]

I'd like another field "Details" so we can auto generate the API Docs from the Tests like this

{
"Tests": [
{
"Convey": "Creating your new Persona saves it as a public entry",
"Details": "The concept is that you personally will have more than one device, so you share your own data to your own devices. There is no need to link as we will use query() to fill a Profile",
"Zome": "personas",
"FnName": "personaCreate",