LP#1666706: add --with-websockets-port configure option This patch adds the ability to specify the WebSockets port as a configure option, avoiding the need to manually edit a couple JavaScript files if one chooses to proxy WS traffic. This patch also cleans up the set of JavaScript files that are installed so that some test case files are not installed by default. Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>