Merge pull request #196 from Kotlin/fix/tidy-build-files

Tidy build files

Author: adam-enko

.gitignore

@@ -1,9 +1,8 @@
-.idea
+.idea/
 *.iml
-.gradle
-.gradletasknamecache
-build
-out
-target
+.gradle/
+build/
+out/
+target/
+.DS_Store
 local.properties
-node_modules