Update gitignore

.gitignore

@@ -1,18 +1,55 @@
-.gradle
-/local.properties
+## Windows/Mac Files
 .DS_Store
 Thumbs.db
-/build
-/captures
-*/signing.properties
+
+# User-specific stuff
+**/.idea/**/workspace.xml
+**/.idea/**/tasks.xml
+**/.idea/**/usage.statistics.xml
+**/.idea/**/dictionaries
+**/.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+**/.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+**/.idea/modules.xml
+.idea/modules
+
+# IntelliJ
+.idea/caches/
 *.iml
-.idea/libraries
-.idea/shelf
-app.xml
-gradle.xml
 misc.xml
-modules.xml
-workspace.xml
 .name
 
-build_file_checksums.ser
+## Gradle
+.gradle
+
+## Properties
+/local.properties
+
+## Build
+build/
+/captures
+
+# Fastlane
+fastlane/report.xml
+
+# Signing Keys
+*.jks