def loadSignature(_signatureFileName)
 		sigFile = File.open(_signatureFileName)
 		if sigFile==nil
 			puts "Cannot open file "+_signatureFileName
 		else
 			sigText = ""
 			# parses file
 			sigFile.each do |line|
 				line.strip!
 				lineLength = line.size
 				if lineLength==0
 					# The signature text is constructed, now we need a Signature object
 					@signatures.push(Signature.new(sigText, self))
 				elsif line.index("--")==0
 					sigText = line+"\ "
 				else
 					sigText+=line+"\ "
 				end
 			end
 			sigFile.close
 		end
 	end