added xextan source data

Makefile.am

 	espeak-ng-data/ur_dict \
 	espeak-ng-data/uz_dict \
 	espeak-ng-data/vi_dict \
+	espeak-ng-data/xex_dict \
 	espeak-ng-data/yue_dict
 
 DICTSOURCE = \
 vi: espeak-ng-data/vi_dict
 espeak-ng-data/vi_dict: dictsource/vi_list dictsource/vi_rules dictsource/vi_extra dictsource/vi_emoji
 
+xex: espeak-ng-data/xex_dict
+espeak-ng-data/xex_dict: dictsource/xex_list dictsource/xex_rules
+
 cmn: espeak-ng-data/cmn_dict
 dictsource/cmn_listx:
 	ln -svf extra/cmn_listx dictsource/

phsource/intonation

 nucleus fall  90 77 76 8
 endtune
 
+//Xextan
+
+tune s7
+prehead   40 55
+headenv   fall 16
+head       1 80 40 -40 -30
+headextend 70 80 75 65
+nucleus0 fall 100 8
+nucleus  fall 100 18 24 12
+endtune
+
+tune c7
+prehead   40 55
+headenv   fall 16
+head       1 80 40 -40 -30
+headextend 70 80 75 65 
+nucleus0 fall-rise2 100 20
+nucleus  fall-rise2 100 27 34 40
+endtune
+
+tune q7
+prehead   40 55
+headenv   fall 16
+head       1 80 35 -50 -40
+headextend 80 75 70 65 
+nucleus0 fall-rise  100 21
+nucleus  fall-rise2 100 21 34 68
+endtune
+
+tune e7
+prehead   40 55
+headenv   fall 16
+head       1 90 35 -50 -40
+headextend 100 90 
+nucleus0 fall  120 8
+nucleus  fall  120 45 36 8
+endtune
+
 tune chrs
 prehead		0	0
 headenv		fall	0