* New class MarkFreeTTSService to deal with TTS processors that can not handle ssm:marks (like eSpeak) ;
* Simplified the TTSService's interface by removing the possibility to retry a synthesis multiple times with a memory object ;
* Fixed a bug in the time value format ;
* Allowed to continue filling an on-the-fly allocated audio buffer until the next audio encoding;
* The bookmarks are now returned by SAPINative (not tested);
* Misc refactoring.