LRDOCS-823 Document Liferay's web service access security layer
LRDOCS-823 Reminded readers in the SOAP and JSON WS sections to supply an authentication token with their invocation, and referenced the service security layer section.
LRDOCS-823 Remove SOA security layer images as they don't account for the authorization and auth verification processes in web service access security.
Merge branch 'LRDOCS-823-web-svc-security' of https://github.com/jhinkey/liferay-docs into LRDOCS-823-review
LRDOCS-823 Reviewed, minor edits
Merge pull request #772 from jhinkey/LRDOCS-823-web-svc-security

LRDOCS-823 web svc security