Fix error in javascript "playlist xml" -> html routine which messed up display of playlist with nodes 2 or more deep which didn't have any leaves.

Real decoder: Use the real libraries to decode atrac and sipr (sipr still doesn't work, because the flavour is misdetected)
Add a few ifdefs for Loader use.

Some new comments are in.

Start a contribs section in THANKS. This is just a beginning and may need to be rewritten, changed etc...
Anyway, it is now valid to use faad2 v >= 2.6.1

SET_PARAMETERS works agains DSS 5.5.4 and WMS 2003. WMS2003 doesn't
accept empty parameter/value pair, so have to set something.

Fix problem with the search lua wrapper (it always returned the "category" playlist even when searching in "onelevel" mode).
Remove debug prints from the rc.lua module.

Add services discovery support and enhance playlist support for lua interface modules. Added "search", "sort" and "sd" commands to rc.lua. Restored true playlist functionality and sd selection in the lua http intf.

xspf export: write the extension tag before the trackList, we'll need to read it first to handle it properly.

modules/services_discovery/upnp_intel.cpp: Add a todo note: this module needs to be rewritten used the new services discovery API. (this is not really helpful, but yet, that could help to track bugs).

upnp_intel module still has to be rewritten (it will crash at runtime)

Use the services_discovery_GetServicesNames() function in the qt4 and wxwidgets (i don't compile the wxwidgets module so there might be a few warnings/errors). This removes comprehension of how VLC modules work from the interface plugins. This change still needs to be done in the modules/gui/macosx/playlist.m file.

Add argument to module_GetModulesNamesForCapability (and services_discovery_GetServicesNames) to also get the longnames.

Fix module_GetModulesNamesForCapability() and make it handle submodules properly (ie: the shoutcasttv submodule is returned as "shoutcasttv" instead of "shout"). This function (or its services_discovery_GetServicesNames(p_this) specialised version) should be used in interfaces, instead of the current code duplication.

Please report loudly any regression, using spdif or not.