glTF: update copyright year

io_scene_gltf2/__init__.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/com/gltf2_blender_conversion.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/com/gltf2_blender_material_helpers.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/com/gltf2_blender_math.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_export.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_export_keys.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_extract.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_accessors.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_channels.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_sampler_keyframes.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_animation_samplers.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_animations.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_cameras.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_image.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_joints.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_lights.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_material_normal_texture_info_class.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_materials.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

io_scene_gltf2/blender/exp/gltf2_blender_gather_materials_pbr_metallic_roughness.py

-# Copyright 2018 The glTF-Blender-IO authors.
+# Copyright 2018-2019 The glTF-Blender-IO authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.