fix licensing issue

lf reported licensing violations based on their report.

in addition adding apache 2 license in the root dir as requested by LF.

Change-Id: I09ce70fe05a559e4fa26b41095626e30303c4d2f
Issue-ID: SDC-1220
Signed-off-by: Michael Lando <ml636r@att.com>
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..67a5857
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,12 @@
+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.
\ No newline at end of file