Doc: Minor fixes across the documentation

This patch introduces a colection of minor issues:
* Fixed whitespace
* Fixed table formatting
* Fixed link references
* Updated version references in text

Change-Id: I1ff8ac4eec956467506f488df84c95fd4f3df7a0
Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>