Lift Framework 3.0-M0

This build includes early work on Lift 3.0 that has been available in the snapshot for
some time, as well as some recent cleanup that has gone in. It is a stable base for
people who have been using Lift's 3.0 snapshot, as there is likely to be continuing and
significant churn in the mainline 3.0 snapshot over the coming months.

A couple of new features include:

• Round-trips and streaming promises
• Custom data- and element handling

More to come on that front—and more to be documented as well.

Removed Deprecations

• JSONParser, Lift's legacy JSON parser, along with its dependents:
  • MetaRecord.setFieldsFromJSON
  • MetaRecord.fromJSON
  • CometActor's handleJson, jsonCall, and jsonInCode
  • S.buildJsonFunc
  • S.jsonFmapFunc with Any=>JsCmd
  • JsonHandler
  • SHtml.fjsonCall
  • SHtml.jsonButton with Any=>JsCmd
  • SHtml.jsonForm
• Mapper and MetaMapper's snippet bindings that use PartialFunctions:
  • addSnippet, editSnippet, viewSnippet (in favor of addFormSnippet,
    editFormSnippet, and viewTransform, all based on CSS selector transforms)
  • modSnippet, used in addSnippet and editSnippet, superseded by formSnippet.
  • add, edit, and view snippets in HTML, in favor of addForm, editForm,
    and viewTransform
  • fieldMapperPF, in favor of fieldMapperTransforms
  • fieldPF, appendField, and prependField, in favor of fieldTransforms,
    appendFieldTransform, and prependFieldTransform.
• lift-mongo's MongoIdentifier in favor of ConnectionIdentifier in lift-util
• lift-mongo's constructors and methods dealing with db connections that aren't in
  the form of MongoClient (Mongo, MongoHost, etc)