improve trademark symbol usage and add trademark footer
-------------------------------------------------------
Key: HADOOP-7309
URL: https://issues.apache.org/jira/browse/HADOOP-7309
Project: Hadoop Common
Issue Type: Improvement
Reporter: Owen O'Malley
We only need to mention trademarks on the first usage, add a footer specifying
the trademarks, and update the pdf files.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
