Add task to prune dev data

Author: rossta

lib/tasks/development/prune.rake

@@ -0,0 +1,7 @@
+namespace :development do
+  desc "Prune branch-specific databases"
+  task :prune_data do
+    Dir["storage/development/data-*.sqlite3"]
+      .each { |file| File.delete(file) && puts("Deleted #{file}") }
+  end
+end