* Add a DeployConfiguration class to hold settings related
to deployment.
* Add BuildStepsList to hold a list of buildsteps
* Update BuildConfiguration to use BuildStepLists instead of
manageing lists of buildsteps itself.
* Update BuildManager to use BuildStepLists in its interfaces
* Fix fallout introduced by API changes
* Update .user file to new way of storing settings
Task-number: QTCREATORBUG-1427
Task-number: QTCREATORBUG-1428
Task-number: QTCREATORBUG-1811
Task-number: QTCREATORBUG-1930
We create a .sis package per leaf project now, deploy all of them and
start the executable for the runconfiguration that was selected. This
does not cover all use cases, but works for development.
* Add "Deploy" to BuildSteps::Type
* Update UIs to handle deploy steps
* Turn existing package creation steps from build type to deploy type
* Move packaging steps into deploy steps when loading projects
Reviewed-by: dt
