Ignore IntelliJ project files + cleanup

.gitignore

@@ -1,13 +1,18 @@
-
+*.pyc
+.deps
 .externalToolBuilders
-.DS_Store
+.internal
 .lock-wscript
-build
-*.pyc
 .project
 .cproject
+build
 builtins
-.internal
-.deps
+js-web/
 node_modules/
-js-web/
+
+# IntelliJ IDEA
+/.idea
+/*.iml
+
+# Mac
+.DS_Store