Remove lib folder from autoload path

- Load extensions explicitly

lib/gem_ext/paper_trail.rb

@@ -0,0 +1,23 @@
+# the following line is required for PaperTrail >= 4.0.0 with Rails
+PaperTrail::Rails::Engine.eager_load!
+
+PaperTrail::Version.module_eval do
+  self.abstract_class = true
+end
+
+# Store console and rake changes in versions
+if defined?(::Rails::Console) || File.basename($PROGRAM_NAME).split(' ').first == 'spring'
+  PaperTrail.whodunnit = "console-#{`whoami`.strip}"
+elsif File.basename($PROGRAM_NAME) == "rake"
+  # rake username does not work when spring enabled
+  PaperTrail.whodunnit = "rake-#{`whoami`.strip} #{ARGV.join ' '}"
+end
+
+class PaperSession
+  class << self
+    attr_writer :session
+    def session
+      @session ||= Time.zone.now.to_s(:db)
+    end
+  end
+end