Feature/predefined normalization

fix #67 and [jubatus#255](https://github.com/jubatus/jubatus/issues/255)

I implemented 3 normalization `num_filter`
- linear scale normalization(o to 1 with/without truncate)
- gaussian normalization(-1 to 1 normalization)
- sigmoid normalization(0 to 1)

fixed.
By the way, this code referenced  `create_add_filter` test which was exist, that should be fixed too?