added IDEA project files to ignore
diff --git a/.gitignore b/.gitignore
index 9d4f2fc..78dd85d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,7 @@
 *.class
 *.jar
 *.war
+*.ipr
+*.iws
+*.iml
 target