add gitignore

.gitignore

@@ -0,0 +1,28 @@
+*.class
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+
+#Gradle temporary files
+target/
+
+#Eclipse files
+**/.project
+**/.classpath
+**/.settings/
+blog/bin/
+**/.tern-project
+
+#IntelliJ files
+**/*.iml
+**/.idea
+**/.gradle
+
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*