add tts-server executable

This makes the project easier to use when installing via package manager.

server/server.py

@@ -76,5 +76,9 @@ def tts():
     return send_file(data, mimetype='audio/wav')
 
 
-if __name__ == '__main__':
+def main():
     app.run(debug=args.debug, host='0.0.0.0', port=args.port)
+
+
+if __name__ == '__main__':
+    main()

setup.py

@@ -75,6 +75,11 @@ setup(
     url='https://github.com/mozilla/TTS',
     description='Text to Speech with Deep Learning',
     license='MPL-2.0',
+    entry_points={
+        'console_scripts': [
+            'tts-server = TTS.server.server:main'
+        ]
+    },
     package_dir={'': 'tts_namespace'},
     packages=find_packages('tts_namespace'),
     package_data={