New gitignore

.gitignore

@@ -1,5 +1,6 @@
 # Built application files
 /*/build/
+build/*
 
 # Crashlytics configuations
 com_crashlytics_export_strings.xml
@@ -14,17 +15,7 @@ local.properties
 .signing/
 
 # User-specific configurations
-.idea/libraries/
-.idea/workspace.xml
-.idea/tasks.xml
-.idea/.name
-.idea/compiler.xml
-.idea/copyright/profiles_settings.xml
-.idea/encodings.xml
-.idea/misc.xml
-.idea/modules.xml
-.idea/scopes/scope_settings.xml
-.idea/vcs.xml
+.idea/*
 *.iml
 
 # OS-specific files
@@ -35,3 +26,12 @@ local.properties
 .Trashes
 ehthumbs.db
 Thumbs.db
+
+# Documents
+*.pdf
+*.doc
+*.docx
+*.odt
+
+# APKs
+*.apk