Trainable Weka Segmentation: update main GUI titles and author e-mail.
Trainable Weka Segmentation: create merged plugin and deprecate old ones.

As decided by consensus, merge the Trainable Segmentation and Advanced Weka Segmentation (AWS) plugins into a new one based on AWS with the new name, and keep old ones under "Segmenation > deprecated".
Merge branch 'master' of https://github.com/fiji/fiji

This merge was done to include the Trainable Weka Segmentation changes.