Fiji Archipelago: UI Fixes
Weka Segmentation: Added setTrainHeader(Instances newHeader) to WekaSegmentation
Fiji Archipelago: Better error reporting, Duplex class, some simplifications
Archipelago Plugins: Clusterized 2D Batch Weka Segmentation
Fiji Archipelago: Cache host name on remote nodes in ArchipelagoClient
Fiji Archipelago: Remote errors indicate host