couple of bugfixes and enhancements

- XMLConverter: add "traceback" for better errormsgs in try-catch
- MoviePrePlay: fix "not-enough-metadata" glitch
- SearchResult: movie/show/episode sections
fixed typo and added link to Wiki
Music playback - this is highly experimental :)
reworked global settings

- now with .cfg file similar to ATVSettings
=> no need to modify source code any more!
- added option to disable DNSServer
=> in case you have your own...
update readme: new settings.
ATVLogger needs to send a response thanks to rippiedoos on the forum :)
Combined Audio and sub menus
Fix for combined Audio/Sub double click
URLs: WebServer to crack up path and options

- cleaner "options" handling to prepare for UDID
- changed atvlogger to print it's argument instead of path
- more cleanup needed for "search"
Revert "URLs: WebServer to crack up path and options"

This reverts commit c54bacfebfd785591caf4519faf5a04f0f5c6577.
2nd try to clean URL/options.

SEARCH:
- search.xml: set search path suitable for PMS.
- WebServer: get rid of fake PlexCommand "Search". Search_Result.xml is
processed like any other XML Template.
- XMLConverter: return Search_Results based on path "/search?".
URL/OPTIONS:
- WebServer: separate "PlexConnect" options
- XMLConverter: rely on WebServer's options, rename PlexUDID to
PlexConnectUDID.