Get rid of most of the insane string-tunings API

Get rid of most of the insane string-tunings API

convert-ly rules are there.  Translations should compile again after applying convert-ly, but of course the changes to text and examples should be propagated eventually with the usual processes.

This is intended for dev/staging as soon as staging contains a convert-ly-clean tree.

[Carl, 2011-10-25 15:55:34]

LGTM.

Thanks, David.  Nicely done.

Carl

http://codereview.appspot.com/5318046/diff/12002/input/regression/tablature-l...
File input/regression/tablature-letter.ly (right):

http://codereview.appspot.com/5318046/diff/12002/input/regression/tablature-l...
input/regression/tablature-letter.ly:32: stringTunings = \stringTuning \notemode
{ <a d' f' a' d'' f''> }
Why not just 

stringTunings = \stringTuning <a d' f' a' d'' f''>

?

[dak, 2011-10-25 16:05:42]

http://codereview.appspot.com/5318046/diff/12002/input/regression/tablature-l...
File input/regression/tablature-letter.ly (right):

http://codereview.appspot.com/5318046/diff/12002/input/regression/tablature-l...
input/regression/tablature-letter.ly:32: stringTunings = \stringTuning \notemode
{ <a d' f' a' d'' f''> }
On 2011/10/25 15:55:34, Carl wrote:
> Why not just 
> 
> stringTunings = \stringTuning <a d' f' a' d'' f''>
> 
> ?

Music functions parse their arguments in the current mode.  Context
modifications are delivered in "initial mode" that knows no notenames but can
deal with identifiers containing hyphens, something which is not possible in
"note mode".

Why it would be a good idea to define identifiers for context variables that
can't be entered in notemode escapes me, but there you are.

Oh, and switching on notename conversions just in case is too expensive anyway:
whenever you switch on notemode, the current notename alist is translated into a
hashtable again.

At some point of time, I plan to permit mode-switching while scanning music
function argument lists.

At some point of time, I plan to decrease the necessity for all those stupid
different modes.

This point of time is not there.  Hence the example with \notemode to avoid
tripping users up all too bad.