Expunge notion of 'dflt' language tag from Ttopen.pm and volt2ttf.  volt2ttf simplified to let Ttopen::update() harmonize the scripts and language trees.
Expunge notion of 'dflt' language tag from Ttopen.pm and volt2ttf. 
volt2ttf simplified to let Ttopen::update() harmonize the scripts and language trees.

git-svn-id: 98a9805b04c7ad1a3f3c712d42269270405357a5@892 4dbf3599-f9e3-0310-9a96-835ab5cc0019

silnrsi/font-ttf-scripts