CTR: docs   Note: updates the stylesheet
Backport improvements to introductory section of Context document
Includes backport of markup for "detail-table" table variant,
used by "Naming" section here.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@1457371 13f79535-47bb-0310-9956-ffa450edef68