Fixed wrong baseline alignment for TextInput

[ChangeLog][QtQuick][Fixed wrong baseline alignment for TextInput]

Task-number: QTBUG-36749
Change-Id: I6920fb0681f30d9e9943d1bd01f76cc3ae204f30
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Disable Flickable tests on Mac OS X.

Task-number: QTBUG-36804

Change-Id: Ic38e4172f4a6978ad4e9b9a460106cadaaaeff3a
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Add Image::mipmap to support mipmapping of images.

[ChangeLog][QtQuick] New feature: Image.mipmap

Task-number: QTBUG-19961

Change-Id: I13acb2408d5b126790adaf9d324ad4beda1e3646
Reviewed-by: Michael Brasser <michael.brasser@live.com>