Added require_all method to replace explicitly requiring every source file, added SoundManager and sound effects, added sound for shield/health regen

lib/sound_effects/fade_in_and_out.rb

@@ -0,0 +1,22 @@
+class IMICFPS
+  class SoundEffect
+    class FadeInAndOut < FadeIn
+      def setup
+        @hang_time = @options[:hang_time] ? @options[:hang_time] : 0.0
+
+        super
+      end
+
+      # TODO: Handle hang time
+      def ratio
+        r = super
+
+        if r < 0.5
+          r * 2
+        else
+          2.0 - (r * 2)
+        end
+      end
+    end
+  end
+end