minor change: rename aspiration_coef to aspiration in the output file

src/logging/ABMTimeStepLog.java

@@ -86,7 +86,7 @@ public void appendLogFile(String fileName) {
 		BufferedWriter bw = new BufferedWriter(fw);
 		PrintWriter writer = new PrintWriter(bw);
 
-		String name = "year,name,age,education,memory,alpha_plus,alpha_minus,lambda,phi_plus,phi_minus,reference_income,aspiration_coef,"
+		String name = "year,name,age,education,memory,alpha_plus,alpha_minus,lambda,phi_plus,phi_minus,reference_income,aspiration,"
 				+ "beta_l,beta_s,beta_p,tolerance_activity,tolerance_income,activity_dissimilarity,income_dissimilarity,learning_rate,satisfaction," 
 				+ "income,strategy,";