Add missing \since tags for new API introduced by Qt 5.4.

Change-Id: Ie51d6e549d80baae57864d4e0d43a1c58897f149
Reviewed-by: Timur Pocheptsov <Timur.Pocheptsov@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Add change log for Qt 5.4.0 release

Change-Id: I9eca03f01ba01e9952c28c6d4bd14f656aa5d838
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reviewed-by: Timur Pocheptsov <Timur.Pocheptsov@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@theqtcompany.com>
Fix spelling mistake in change logs

Change-Id: Ia82082ce24c98b69697b348dc20164b8ec034a0b
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>
Merge remote-tracking branch 'origin/5.4.0' into 5.4

Change-Id: Ib79fe0b33b405cdf6fee87f97f6ebb86bb79d976