By introducing the OutputFormatter, RunControls can influence the formatting
depening on the application started. A nice (and intended) side-effect is that
the QML runtime specific formatting will not interfere anymore with anything
else.

Unify names to QmlProjectApplicationWizard & QmlProjectImportWizard

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

Extend logic for mimetype matching in QmlJsEditor: Also
handle sub-mimetypes like x-application-qmlproject, which
extends x-application-qml.

Old format is still available as a fallback.

Will be used in QmLInspector plugin.

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. :)