Add List All The Say Voices as zsh til.

zsh/list-all-the-say-voices.md

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+# List All The Say Voices
+
+The `say` command can be a fun party trick.
+
+```bash
+$ say Get ready for the bass to drop
+```
+
+Your friends will be even more impressed when you use some of the alternate
+voices.
+
+```bash
+$ say -v Daniel Would you like a cup of tea?
+```
+
+To see all the alternate voices available, type the following
+
+```bash
+$ say -v '?'
+```
+
+[source](http://stackoverflow.com/questions/1489800/getting-list-of-mac-text-to-speech-voices-programmatically)