Added changes-5.3.1 file.

General comment about documentation fixes

Change-Id: Ie344dd701da02ab9c344b5ffd39e4d0c9b6ea31f
Reviewed-by: Sergio Ahumada <sahumada@blackberry.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Merge remote-tracking branch 'origin/5.3.1' into 5.3

Change-Id: Ib12a908dce5ea0286c90937fe282c11b495d3927
Merge "Merge remote-tracking branch 'origin/5.3.1' into 5.3" into refs/staging/5.3
Update "Getting Started with Qt for Android".

- Mention the dependencies that are necessary for 64-bit machines.
- Remove mention of JAVA_HOME, as that's done in Creator now.

Change-Id: I1bcb1f607fe80ba9089f746b3c01f40a66e6f6b7
Reviewed-by: Venugopal Shivashankar <venugopal.shivashankar@digia.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Doc: Updated the list of Demos published

Added a couple of links to apps that are published on Android
and iOS app stores.

Change-Id: Ied6c3723d7b38b722a7ac5c9865f4d7eeaef87da
Reviewed-by: Nico Vertriest <nico.vertriest@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Doc: Fixed small typo in graphics topic page.

Change-Id: I20f773ee9c37a52250a4aeb464047a85e2de0a06
Task-number: QTWEBSITE-563
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Merge remote-tracking branch 'origin/5.3' into dev

Change-Id: I3f504f5a1a39ca63b4986ab2c8d5d5873148ecab