Update .gitignore

.gitignore

@@ -1,16 +1,33 @@
-# Created by .ignore support plugin (hsz.mobi)
-*.class
-*.log
-*.ctxt
-.mtj.tmp/
-*.jar
-*.war
-*.ear
-*.zip
-*.tar.gz
-*.rar
-hs_err_pid*
-.idea
-*.iml
-out
-gen
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+# User-specific stuff:
+.idea/workspace.xml
+.idea/tasks.xml
+# Sensitive or high-churn files:
+.idea/dataSources.ids
+.idea/dataSources.xml
+.idea/dataSources.local.xml
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+# Gradle:
+.idea/gradle.xml
+.idea/libraries
+# Mongo Explorer plugin:
+.idea/mongoSettings.xml
+## File-based project format:
+*.iws
+## Plugin-specific files:
+# IntelliJ
+/out/
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+# JIRA plugin
+atlassian-ide-plugin.xml
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+src/test/
+target/