processEvents() might lead to an invalid fxObjectNode

Reviewed-by: thartman

"#000000" and "true" is not really an expression and is handled as
value now - this keeps consistency with rewriting and the QmlDom

All files have been renamed from Qml to QDeclarative.
Registration of types is now done in an initializer method.
QmlView/QDeclarativeView doesn't have an execute method any more.
QDeclarativeMetaObject became private API.
QmlMetaProperty / QDeclarativeProperty has now different API.

As a side effect of the caching the ColorGroupBox was broken, because
finished was set to "true" before the property editor was visible.

fixed

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

Patch provided by Aaron Kennedy.

Reviewed-by: akennedy

Before we cached based on the main qml url - This way we skip setting up
the specific widgets each time we change selection

This patch allows setting up property panes before a selection is made

Only update geometry based properties in  transformChanged()