Update .gitignore

.gitignore

-.project
-.classpath
-.settings/*
-target/*
-chromedriver.log
+*.class
 .checkstyle
-/target
+/target/
+
+# Environment specific files
+*~
+*.bak
+*.iml
+*.log
+.*.sw?
+.classpath
+.directory
+.DS_Store
+.idea/
+.project
+.settings/
+desktop.ini
+nbproject/
+/.metadata/