new class SpeakersUtilities + modification in STMParser
	modified:   src/model/STMFile.java
	new file:   src/utils/SpeakersUtilities.java
	modified:   src/view/MainForm.form
	modified:   src/view/MainForm.java
	modified:   src/controller/CTM.java
	modified:   src/model/CTMFile.java
	modified:   src/parserSTM/ParserSTM.java