Shiny new Indic shapers!

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+PANGO_LIGATURE_HACK is defined as follows
+
+It comprises a space-seperated list of elements. An 
+element can either be of the form :xx:zzzz, in which 
+case the first part is a language code and the second 
+is a name of another property to look in if the
+language is matched.
+   
+or as follows
+
+  $AAAA=0000+007F-0915,0944
+
+  This defines a set, this will be visible to the entire font.
+    
+or of the form
+  
+  xxxx[+xxxx[+xxxx...]]=yyyy[+yyyy]
+
+  xxxx can either be a hex glyph code which is matches directly, 
+  or %AAAA, where it will match anything in the set.
+
+  yyyy is either a hex glyph code, or %n, in which case it refers
+  to the nth thing to have matched - e.g.
+
+  %FOO+2=2+%1,   would swap instances of $FOO and 2.
+
+
+
+(The language-specific stuff isn't implemented yet, but is parsed OK
+ and duly ignored here. This will be implemented soon)
+
+
+Robert Brady <rwb197@zepler.org>, 2000-11-08