Add ElemAttr* to ajaxForm/jsonForm

[lkuczera]

http://groups.google.com/group/liftweb/browse_thread/thread/b801f1219bdc410b

[indrajitr]

Updating tickets (#950, #956, #976, #980, #982, #999, #1008, #1053, #1078, #1092, #1097)

Pushed pending tickets to 2.4-M5

[indrajitr]

Updating tickets (#956, #976, #980, #982, #1008, #1053, #1078, #1092, #1097, #1128)

[indrajitr]

Updating tickets (#906, #950, #956, #960, #976, #980, #982, #997, #999, #1008, #1053, #1078, #1090, #1092, #1097, #1128, #1134, #1155, #1168)

[github-importer]

Imported from Assembla: http://www.assembla.com/spaces/liftweb/tickets/1097