readded old TTS interface so that 1.x compiles (#62)

Signed-off-by: Kai Kreuzer <kai@openhab.org>

bundles/org.openhab.core.compat1x/META-INF/MANIFEST.MF

@@ -91,6 +91,7 @@ Export-Package: org.codehaus.jackson,
  org.openhab.core.types,
  org.openhab.io.console,
  org.openhab.io.multimedia.actions,
+ org.openhab.io.multimedia.tts,
  org.openhab.io.net.actions,
  org.openhab.io.net.exec,
  org.openhab.io.net.http,

bundles/org.openhab.core.compat1x/src/main/java/org/openhab/io/multimedia/tts/TTSService.java

@@ -0,0 +1,10 @@
+package org.openhab.io.multimedia.tts;
+
+// NOTE: This interface is only kept in order to allow openHAB 1.x TTS services to correctly compile.
+// openHAB 2 is NOT compatible with these services, not even through the compatibility layer.
+// Instead, ESH/openHAB2 compatible TTS services should be used.
+
+public interface TTSService {
+
+    void say(String text, String voiceName, String outputDevice);
+}