SimpleReader is a !simple! parser for json like qml files.
SimpleReader only parses literal properties for e.g. configuration
files.

SimpleAbstractStreamReader allows event based parsing and SimpleReader
stores the parsed data in a reference counted tree structure.

Change-Id: I0f6422a97f5c356149c516f227f8bbd7b736a6d0
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>