Move the JSR-356 WebSocket API and implementation to the main code location.
Update the build to build the JSR-356 WebSocket implementation with Java 7.
Switch the WebSocket examples to use the JSR-356 implementation.
Remove any Java 7 language features (<>, multi-catch).

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1515813 13f79535-47bb-0310-9956-ffa450edef68
Deprecate the Tomcat 7 proprietary WebSocket API

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1515817 13f79535-47bb-0310-9956-ffa450edef68