Update the documentation and build system for producing documentation for
WA3 with support for automatic building on readthedocs.
Note: This is currently a WIP.
Mention in the documentation that Android SDK is optional for
users who plan to run WA on Linux devices only, and how they
would only be able to start running a limited number of workloads.
Also included a few trivial fixes such as spelling errors and
moving sentences around to improve flow.
Signed-off-by: Lisa Nguyen <lisa.nguyen@linaro.org>
Add the uninstall and upgrade commands for users to remove or
upgrade Workload Automation for future reference.
Signed-off-by: Lisa Nguyen <lisa.nguyen@linaro.org>
