Added Gradle to Groovy project.

Groovy/.gitignore

@@ -8,34 +8,16 @@
 # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
 
 # User-specific stuff:
-.idea/workspace.xml
-.idea/tasks.xml
-.idea/dictionaries
-.idea/vcs.xml
-.idea/jsLibraryMappings.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
+.idea/
 
 ## File-based project format:
 *.iws
+*.iml
 
 ## Plugin-specific files:
 
 # IntelliJ
-/out/
+out/
 
 # mpeltonen/sbt-idea plugin
 .idea_modules/
@@ -43,18 +25,9 @@
 # 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
-
-### Intellij Patch ###
-# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
-
-# *.iml
-# modules.xml
-
+# Gradle
+.gradle
+build/
 
 ### Eclipse ###
 
@@ -121,4 +94,3 @@ Session.vim
 *~
 # auto-generated tag files
 tags
-