Optimisation, fixe some bugs, add some comments

.gitignore

@@ -1,3 +1,5 @@
+CMakeLists.txt
+/cmake-build-debug
 /target
 *.class
 /XMemory/target
@@ -12,3 +14,5 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+.idea
+*.iml

Makefile

@@ -73,10 +73,10 @@ clean: cleanex
 cleanex:
 	$(foreach example_dir,$(ALL_EXAMPLE_DIRS), rm -rf $(example_dir)/*.class;)
 
-testsources: $(ALL_TEST_CLASSES)
+testsources: sources $(ALL_TEST_CLASSES)
 	$(JAVAC) $(JAVAFLAGS) -d $(TEST_CLASSES_DIR) -cp src:$(BASE_CLASSPATH) $(ALL_TEST_SOURCES)
 
-tests: $(ALL_TEST_CLASSES)
+tests: sources $(ALL_TEST_CLASSES)
 	$(JAVAC) $(JAVAFLAGS) -d $(TEST_CLASSES_DIR) -cp src:$(BASE_CLASSPATH) $(ALL_TEST_SOURCES)
 	$(JAVA) -ea -cp $(BASE_CLASSPATH):$(TEST_CLASSES_DIR):src -Djava.library.path=$(CPP_BUILD_DIR) tests.PersistentTestRunner
 	$(JAVA) -ea -cp $(BASE_CLASSPATH):$(TEST_CLASSES_DIR):src -Djava.library.path=$(CPP_BUILD_DIR) tests.PersistentTestRunner