Add imd data

spacenetutilities/datasets/license.txt

@@ -0,0 +1,17 @@
+This dataset is released under
+
+   Licensed under the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) (the "License");
+   You may not use these geospatial files except in compliance with the License.
+   You may obtain a copy of the License at
+
+       https://creativecommons.org/licenses/by-sa/4.0/
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+
+
+