Add new Helpers which also reports stats

Closes #11

LGTM given by: @esposito

Squashed commit of the following:

commit 7d600741037ee89292a15a66d98519dbcf8d783c
Author: Marten Veldthuis <marten@veldthuis.com>
Date:   Thu Nov 20 14:36:48 2014 +0100

    Bump version

commit 1e66e3f4db9a4c2213405eed39c83b1b61db4d14
Author: Marten Veldthuis <marten@veldthuis.com>
Date:   Thu Nov 20 14:34:40 2014 +0100

    Rename Helpers to Instrumentation

commit f88009e526294a949d2dfc5ed90495caa7c7f4a9
Author: Marten Veldthuis <marten@veldthuis.com>
Date:   Thu Nov 20 12:44:39 2014 +0100

    Fix specs

commit 36f8df406adb5257df825501c6cedfab3e11d629
Author: Marten Veldthuis <marten@veldthuis.com>
Date:   Thu Nov 20 12:41:57 2014 +0100

    Simplify stats backend

commit 9636b7a20970b463c2c923032d46094e9bb45bcb
Author: Marten Veldthuis <marten@veldthuis.com>
Date:   Thu Nov 20 10:33:00 2014 +0100

    Update changelog

commit 74c32fd19967b0b81f4e214e4bcbc8d2f98cdac0
Author: Marten Veldthuis <marten@veldthuis.com>
Date:   Wed Nov 19 15:43:58 2014 +0100

    Deprecate Roqua::Logging

commit bdd937c8b8307609e19d55cbb5048a0e27562f16
Author: Marten Veldthuis <marten@veldthuis.com>
Date:   Wed Nov 19 15:19:58 2014 +0100

    Add new "Helpers" which also reports stats

commit 8284d5e90b08199cd215a556395de9893a609168
Author: Marten Veldthuis <marten@veldthuis.com>
Date:   Wed Nov 19 15:05:41 2014 +0100

    Move Stats to Roqua::Support

commit b21d8510db75d399a35bc4a79a3b62e234880a3f
Author: Marten Veldthuis <marten@veldthuis.com>
Date:   Wed Nov 19 14:40:32 2014 +0100

    Add a stats backend