change javascript and confernece to use cached speech handles

This is for better performace and to take atvantage of mrcp connections.
There should be no apparent change in usage.
The conference now supports changing the voice via the text string
by starting a text blurb with #voice# eg

#william#This will sound like William.




git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@5664 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch_core.h

@@ -1173,13 +1173,17 @@ SWITCH_DECLARE(switch_status_t) switch_core_file_close(switch_file_handle_t *fh)
   \param module_name the speech module to use
   \param voice_name the desired voice name
   \param rate the sampling rate
+  \param interval the sampling interval
   \param flags tts flags
   \param pool the pool to use (NULL for new pool)
   \return SWITCH_STATUS_SUCCESS if the handle is opened
 */
 SWITCH_DECLARE(switch_status_t) switch_core_speech_open(switch_speech_handle_t *sh,
 														char *module_name,
-														char *voice_name, unsigned int rate, switch_speech_flag_t *flags, switch_memory_pool_t *pool);
+														char *voice_name, 
+														unsigned int rate, 
+														unsigned int interval, 
+														switch_speech_flag_t *flags, switch_memory_pool_t *pool);
 /*! 
   \brief Feed text to the TTS module
   \param sh the speech handle to feed