[url] use IsProtocol in place of GetProtocol
[fileitem] drop GetAsUrl() as GetURL() does the same thing
[dav] have GetStatusTag() iterate over XML elements, not nodes.

As things are, if there are no children of the passed element, we'll have a NULL dereference.
[dav] iterate over XML elements not Nodes in CDavDirectory::ParseResponse() as we assume elements inside the loops anyway
[rssdirectory] have a helper for getting the value of a child XML element rather than calling GetText() and assuming a non-NULL response
[edl] use FirstChild()->Value() rather than GetText() in parsing cut times
[pls playlist] use FirstChild()->Value() rather than GetText() without NULL checks
[advancedsettings] use FirstChild()->Value() rather than GetText() when reading DNS cache entries
[fanart] use FirstChild()->Value() rather than unchecked GetText().

NOTE: Potential change in behaviour in that if a url attribute is specified in the <fanart>
node and <thumb> children are specified without a value, it used to just take url as the
url.  This was not intended, however, as url is supposed to be the base url, not the full url.
[buttontranslator] tidy the MapRemote and MapJoystickActions functions to not use unchecked GetText()
[cosmetic] indenting
[buttontranslator] kill unnecessary ifdefs
[depends/ffmpeg] - fix sed (didn't work on osx) - this fixes pkgconfig from ffmpeg configure
check only first byte of UTF-8 character with isspace in TrimX
Merge pull request #5036 from Memphiz/fixffmpegsed

[depends/ffmpeg] - fix sed (didn't work on osx) - this fixes pkgconfig f...
README.linux update
README.ubuntu update
[addons] sync with repo
[pvr] invalidate all items if window becomes invalid
[pvr] fix ctor args for CGUIMessage to re-broadcast observer notify messages