add self and avatar link to the generated Json

[ulfa]

The actual Json doesn't contain the self link and the avatar link.

{
"author" : "timo",
"time" : "2015-03-13T23:47:07.205+01:00",
"id" : 2975,
"can-delete?" : false,
"text" : "Alter Trick für Maven (2010): Lokale in-project repositories wenn man doch mal ein Artefakt einchecken muss: http://bit.ly/1MzgWmr"
},

Please, insert avatar link and a self link like the following.

"avatar" : "URI"
"self" : "URI"

[aheusingfeld]

This is related to #144. Actually you're missing more than just the two links mentioned above as you don't have

• a link to the "submit" url (including the "method")
• a link to the "reply" url (including the "method")
• a link to the "delete" url (including the "method")
• a link to the "next reply" url
• a link to the "previous reply" url
• links for pagination (see Improve Hypermedia-Support #144)

[stilkov]

Or you could just use the HTML.

[aheusingfeld]

👍 or the atom feed but that doesn't contain all the links either