Reviewed-by: Roberto Raggi

It lists the top level function and variable declarations again.

Ideally most of our visitors won't need to make the QML vs JS
distinction. For these cases it'll be handy to be able to access the AST
no matter whether it's a Program or UiProgram.

Task-number: BAUHAUS-292

This patch ensures that meta info is available for all models
during copy and paste

This is necessary to copy and paste comopnents between different
models.

Expressions are still evaluated in the gui thread, but at least every 100ms
QApplication::processEvents is called.
Evalitation of expression does not completly block the gui anymore.

Follow the text editor and provide a combo box for opened documents. We
might consider removing the tabs all together to look more consistent.

Task-number: QTCREATORBUG-584
Reviewed-by: ck

Changed the QML/JS editor to treat .qs/.js files as JavaScript, and invoke the appropriate parser for it.

Reviewed-by: Christian Kamm

Added utility method to parse JavaScript programs.

Reviewed-by: Christian Kamm

Added a utility method to get a casted AST root node.

Reviewed-by: Christian Kamm

Chances are the user wants to select it anyway.

 - if there is no LastQtVersionUpdate we doesn't have a real timestamp and we are not able to check against this.
 - this will happen during/after installation with qt bundled versions

 Reviewed-by: Daniel Molkentin