Fix the deprecation warning in jsonCall.

It was referring to JValue=>JValue methods, but should have been referring to
JValue=>JsCmd ones.
Deprecate S.fjsonCall, which does not use lift-json.
Deprecate a bunch of stuff that uses the old JSONParser.
Deprecate jsonFmapFunc with old JSONParser.

Also add non-deprecated equivalents that do JValue=>JsCmd.
Deprecate legacy JSONParser things in MetaRecord.
Merge pull request #1543 from lift/more-deprecations

2.6: Deprecate old JSONParser-related stuff

Lift still has a legacy JSON parser that we want to rip out for Lift 3. This deprecates
a slew of functionality in S, SHtml, and CometActor that uses that legacy JSON
parser.