The document includes SDEI sequence diagrams that are generated using
PlantUML [1].
A shell script is introduced to generate SVG files from PlantUML files
supplied in arguments.
[1] http://plantuml.com/PlantUML_Language_Reference_Guide.pdf
Change-Id: I433897856810bf1927f2800a7b2b1d81827c69b2
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>