Update for Qt5.3.0 installer configurations

Missing content updated.
WinRT configurations updated.
Update all other items needed for Qt5.3.0 release.

Offline installer conf files put into dedicated directory.
Build meta information file updated for 5.3.0 release.

Change-Id: Icd36be7ac99533892aad07c7f9821f1ec9b43c2b
Reviewed-by: Antti Kokko <antti.kokko@digia.com>