Return immediately if calling stop() results in the current object being
deleted.

Task-number: QTBUG-31247
Change-Id: I684a858bfb4cc53f415daa8cc1c4df96067daa1c
Reviewed-by: Alan Alpert <aalpert@blackberry.com>

Change-Id: I6c3bd7bebe3d62d1cfd0fa6334544c9db8398c76
Reviewed-by: Akseli Salovaara <akseli.salovaara@digia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>

Change copyrights and license headers from Nokia to Digia

Change-Id: Ie7f5d49ed8235d7a7845ab68f99ad1c220e64d5c
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

Change-Id: Ia4ba88bef012cee7329244adf10c219bd763a936
Reviewed-by: Michael Brasser <michael.brasser@nokia.com>

Symbols beginning with QDeclarative are already exported
by the quick1 module.

Users can apply the bin/rename-qtdeclarative-symbols.sh
script to modify client code using the previous names of the
renamed symbols.

Task-number: QTBUG-23737
Change-Id: Ifaa482663767634931e8711a8e9bf6e404859e66
Reviewed-by: Martin Jones <martin.jones@nokia.com>

Change-Id: Ic108adfb99a09e6ede71d474240fb0917cee6961
Reviewed-by: Bea Lam <bea.lam@nokia.com>

Change-Id: Ifa850c2848c61319cb2465d7fcfffc7fef630923
Reviewed-by: Yann Bodson <yann.bodson@nokia.com>

The new backend improves performance, and allows us to create
multiple running animation jobs from a single Transition. It is
based off of the existing Qt animation framework.

Change-Id: Id1d0162f6e5c65bf31267f3f9f2042c354375d57
Reviewed-by: Yunqiao Yin <charles.yin@nokia.com>