All files have been renamed from Qml to QDeclarative

The API of QmlView has changed. Also, the QmlDom classes became private.

Patch provided by Aaron Kennedy.

Reviewed-by: akennedy

metatype redefinition

The new QML Inspector depends on DebuggerPlugin. Also added a dropdown menu into
the debugger toolbar from which the user can select the used debugging
language, e.g. C++ or QML.

Putting every class in it's own files + avoid "using namespace"

 * Ease cross device development by introducing 'targets' which
   group build- and runsettings that are valid for this one target

 Most of the kudos for the code review go to dt. Con, thorbjorn,
 ckandler and others did also review parts of this patch.

Reviewed-by: dt

longer allowed.

  * Use id() for methods returning a string used to represent
    some type of object.
  * Use displayName() for strings that are meant to be user
    visible.
  * Quieten some warnings while touching the files anyway.
  * Move Factories to their products in the plugins where that
    was not done before.

Reviewed-by: dt

no longer uses LocalAppRunConfiguration. QmlInspector now uses
the qmlviewer started by QmlProjectManager instead of starting
its own, and clicking the Start Debug button within a QML
project will switch to QML Inspect mode and start the inspector.

This is part of a bigger change to get rid of the output mode.

Reviewed-by: con