Add link to RUNNING.txt and refer to it as the main documentation on this topic.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1435636 13f79535-47bb-0310-9956-ffa450edef68
Reformat

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1435641 13f79535-47bb-0310-9956-ffa450edef68
Correct broken sentence.
There are no loggers in Tomcat 7.
An XML parser is not bundled, as it is now provided by JRE.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1435642 13f79535-47bb-0310-9956-ffa450edef68