Add *.iws to .gitignore.
diff --git a/.gitignore b/.gitignore
index 1ba8ddb..cb57058 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,5 +11,6 @@
 .project
 .classpath
 .settings
+*.iws
 *~
 \#*\#