Add appendinx about xbmc issues

XBMC won't boot because a different libtag version got
installed with mopidy system wide, and XBMC picks that up
insted of the one it vendors in. Added info how to fix this.
Helpfully I don't have the xbian workaround link to hand.
On 3 Dec 2014 20:46, "Nick Steel" <kingosticks@gmail.com> wrote:

> There is a very similar libtag issue with the xbian distribution but the
> dependency problem there prevents you from installing mopidy in the first
> place. The hack to get around the issue is, or at least the one I've used,
> is very different. This should probably be mentioned here else it'll lead
> xbian people down the wrong path.
> On 3 Dec 2014 20:43, "Stein Magnus Jodal" <notifications@github.com>
> wrote:
>
>> In docs/installation/raspberrypi.rst:
>>
>> > @@ -141,3 +141,30 @@ not determined the exact revision that fixed this::
>> >  The only remaining known issue is a slight gap in playback at track changes
>> >  this is likely due to gapless playback not being implemented and is being
>> >  worked on irrespective of Raspberry Pi related work.
>> > +
>> > +
>> > +Appendix B: XBMC not booting?
>> > +=============================
>> > +
>> > +A very important note for RaspBMC users. Due to a dependency version problem,
>> > +you might have to make some minor configurations for XBMC to start properly
>> > +(this depends on your system’s version).
>> > +
>> > +If you notice that XBMC is not starting but gets stuck in a loop,
>> > +you need to make these configurations.
>> > +In short, what you have to do is the following:
>> > +
>> > +    sudo ln -sf /home/pi/.xbmc-current/xbmc-bin/lib/xbmc/system/libtag.so.1 /usr/lib/arm-linux-gnueabihf/libtag.so.1
>>
>> This would be better broken over two lines with \ newline escape so it
>> still can be copy-pasted into a shell.
>>
>> —
>> Reply to this email directly or view it on GitHub
>> <https://github.com/mopidy/mopidy/pull/897/files#r21263375>.
>>
>