Update File Exchange text

doc/Text for File Exchange.txt

@@ -8,7 +8,17 @@ Matlab does not provide a general, polymorphic object display function, like Jav
 
 The Dispstr API provides a concise API for generic, polymorphic, customizable object display, and implementations for the major types that come with Matlab.
 
-Dispstr only provides a few functions and classes: dispstr(), dispstrs(), prettyprint(), sprintfds(), fprintfds(), and dispstrlib.Displayable. dispstr() and disptrs() are generic object display functions, which can be overridden by user-defined classes to customize their display. prettyprint() is a function for dumping the details of an array, and respects dispstr/dispstrs. sprintfds() and fprintfds() let you do formatted output that respects dispstr(). @dispstrlib.Displayable is a convenience mixin that makes it easier to write classes that implement dispstr/dispstrs.
+Dispstr only provides a few functions and classes: 
+
+dispstr() and dispstrs()
+
+prettyprint()
+
+sprintfds(), fprintfds(), errords(), and warningds()
+
+dispstrlib.Displayable and dispstrlib.DisplayableHandle
+
+dispstr() and disptrs() are generic object display functions, which can be overridden by user-defined classes to customize their display. prettyprint() is a function for dumping the details of an array, and respects dispstr/dispstrs. sprintfds() and fprintfds() let you do formatted output that respects dispstr(). errords() and warningds() are variants of error() and warning() that respect dispstr formatting. And @dispstrlib.Displayable is a convenience mixin that makes it easier to write classes that implement dispstr/dispstrs.
 
 When using this library, your user-defined objects can now be displayed inside structs and tables with meaningful data representations, instead of just "<1-by-1 SomeClass>", which Matlab's default disp() does when objects are stuck inside fields of cells or variables of tables.