The QML task manager behaviour is to show warnings/errors for _saved_ files
only.

Previously we just scanned every directory containing a qml file for
other qml files.

This makes import ".." work.

Reviewed-by: Erik Verbruggen

Reviewed-by: Roberto Raggi

See c722282c.

Suggested by Erik Verbruggen

* Fill the snapshot with files that could be imported.
* Implement package imports.

* The qmldir file is not parsed yet.

Reviewed-by: Erik Verbruggen

Use a lowercase .qml file found in project tree if no current file is
selected. This way we don't have to disable run controls if there are
some files to execute.

Reviewed-by: kkoehne

All files have been renamed from Qml to QDeclarative.
Registration of types is now done in an initializer method.

We used to fail back to the old format if the .qmlproject file
was invalid. Anyhow, this lead to weird effects ... better disable
it explicitly.

That no warning is shown right now when loading an invalid qmlproject
file is a bug in coreplugin.

metatype redefinition

Check for the case that a new file to be added to a .qmlproject
is also automatically covered e.g. by a wildcard filter. In this
case we don't have to do anything.

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

 * That is what everybody else is using now.

Reviewed-by: dt

 * This makes it easier to distinguish projects in the
   userfileaccessor

Reviewed-by: dt

Old format is still available as a fallback.

The custom creator-qml installer comes with a qmlviewer installed
in creator/bin. Make sure that this qmlviewer is used to run .qmlproject
files, even though there might be other qmlviewer binaries in the
PATH.

server before it has started.

Reviewed-by: thorbjorn

  * 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 will right now wait for a qmldebugger connection.

QmlProject used LocalApplicationRunCOnfiguration, but didn't provide
e.g. an associated BuildConfiguration. Fix this by implementing it's
own QmlRunControlFactory, QmlRunControl.

Note: I didn't fix all the connects and there are a few missing things.
This compiles, more work is coming.

Enables users to change which buildsteps get run per buildconfiguration.
Some further tweaks are probably necessary. This is a rather big
change, though it should work. :)