* 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
* 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
