text-to-speech: simple cross-platform text-to-speech.

diff --git a/extra/text-to-speech/authors.txt b/extra/text-to-speech/authors.txt
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+John Benediktsson

diff --git a/extra/text-to-speech/linux/linux.factor b/extra/text-to-speech/linux/linux.factor
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+! Copyright (C) 2013 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: formatting io io.encodings.utf8 io.launcher system
+text-to-speech ;
+
+IN: text-to-speech.linux
+
+M: linux speak-text
+    "festival --tts" utf8 [ print ] with-process-writer ;

diff --git a/extra/text-to-speech/macosx/macosx.factor b/extra/text-to-speech/macosx/macosx.factor
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+! Copyright (C) 2013 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: formatting io.launcher system text-to-speech ;
+
+IN: text-to-speech.macosx
+
+M: macosx speak-text
+    "say \"%s\"" sprintf try-process ;

diff --git a/extra/text-to-speech/summary.txt b/extra/text-to-speech/summary.txt
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+Text-to-speech utility

diff --git a/extra/text-to-speech/text-to-speech.factor b/extra/text-to-speech/text-to-speech.factor
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+! Copyright (C) 2013 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: combinators generic kernel math math.text.english present
+strings system ui.operations vocabs ;
+
+IN: text-to-speech
+
+! 1. "say"
+! 2. festival, freetts, gnuspeech, espeech, flite, etc.
+! 3. core-audio?
+! 4. use google-translate-tts, download and play?
+
+HOOK: speak-text os ( str -- )
+
+{
+    { [ os macosx?  ] [ "text-to-speech.macosx"  ] }
+    { [ os linux?   ] [ "text-to-speech.linux"   ] }
+    { [ os windows? ] [ "text-to-speech.windows" ] }
+} cond require
+
+GENERIC: speak ( obj -- )
+
+M: object speak present speak-text ;
+
+M: integer speak number>text speak-text ;
+
+[ \ present ?lookup-method ] \ speak H{ } define-operation

diff --git a/extra/text-to-speech/windows/platforms.txt b/extra/text-to-speech/windows/platforms.txt
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+windows

diff --git a/extra/text-to-speech/windows/windows.factor b/extra/text-to-speech/windows/windows.factor
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+! Copyright (C) 2013 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: google.translate system text-to-speech windows.winmm ;
+
+IN: text-to-speech.windows
+
+M: windows speak-text
+    translate-tts open-command play-command close-command ;