Doc addition: glossary, meter

[Peter Chubb]

In the glossary of the online-documentation for 2.11, section `meter'
there are two additions it'd be worth making.

 1.  The UK spelling is `metre'
 2.  The `meter' (or metre) header line for hymn music refers to the
     the arrangement of syllables into lines for the corresponding lyrics.

Metre can be expressed either as grups of numbers (87.87) or as
letters (C.M. == common metre; L.M. or LM == long metre; DCM == double
common metre).

For example, common metre (C.M.) is 86.86 -- four alternating lines of eight
and six syllables, arranged as two couplets.  Conventionally, common
metre is iambic, i.e., the first syllable is unstressed (and the
corresponding music begins with an anacrusis).  Example: Amazing Grace
is common metre.

Some hymns and their tunes are double length versions of a simpler
metre: e.g., DCM, double common metre, or 86.86D or 86.86.86.86

Example: `Forest Green' arranged by R. Vaughn Williams (O Little
town of Bethlehem) is DCM.
--
Dr Peter Chubb  http://www.gelato.unsw.edu.au  peterc AT gelato.unsw.edu.au
http://www.ertos.nicta.com.au           ERTOS within National ICT Australia