Added LICENSE

LICENSE

@@ -0,0 +1,25 @@
+Dristhi software
+
+Copyright 2012-2014
+
+Foundation for Research in Health Systems; Sustainable Engineering
+Lab, Columbia University; and The Special Programme of Research,
+Development and Research Training in Human Reproduction (HRP), World
+Health Organization.
+
+Licensed under the Apache License, Version 2.0 (the "License"); you may
+not use this file except in compliance with the License. You may obtain
+a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+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.
+
+Notice: The licensors gratefully acknowledge the generous support of the
+Wellcome Trust, the Norwegian Agency for Development Cooperation, and
+the Bill and Melinda Gates Foundation; and the technical contributions
+of ThoughtWorks; which have contributed to making this software possible.