Ukulele string tunings

[Choan Gálvez]

Hi.

Current tunings for tenor and baritone ukulele are string reversed. From 
`ly/string-tunings-init.ly`:

%% ukulele tunings
\makeDefaultStringTuning #'ukulele-tuning \stringTuning <g' c' e' a'>
\makeDefaultStringTuning #'ukulele-d-tuning \stringTuning <a' d' fis' b'>
\makeDefaultStringTuning #'tenor-ukulele-tuning \stringTuning <a' e' c' g>
\makeDefaultStringTuning #'baritone-ukulele-tuning \stringTuning <e' b g d>

Those two last tuning should be <g c' e' a'> and <d g b e'> respectively.

In addition, I'd say those two tunings are weirly named -- from the same 
file, all guitar tunings are named `guitar-something`, all banjo tunings 
`banjo-something`.

As I haven't find any report about the wrong definitions, I think it's 
be safe to assume that no one is using them and it would be ok to rename 
them.

I'd suggest rewriting them as:

\makeDefaultStringTuning #'ukulele-linear-tuning \stringTuning <g c' e' a'>
\makeDefaultStringTuning #'ukulele-baritone-tuning \stringTuning <d g b e'>

or alternatively, remove them.

What do you think?

Best.
--
Choan Gálvez