Fix QNetworkAccessManager being destroyd too late

Change-Id: I7d4bc7c1529a58e725bad1f957391436627c2fd5
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Remove properties from EnginioModelBase

Change-Id: Ifdb7f8dba0eb7fe5f9e8ab73044af0009baa46fe
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Remove empty init function

Change-Id: I288a6f034c21dd3622639fa078991114e9db46af
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
Start moving code away from ReplyBase

Change-Id: Ib164de80c2741261e587c095635f7bc9e61c18f5
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>