Make changes required for OSS. Add a LICENSE.md file, Add CONTRIBUTING.md file, and add copyright to main file (main.swift). (#7)

Author: didiergarcia

CONTRIBUTING.md

@@ -0,0 +1,5 @@
+*Contributing*
+
+**All third party contributors acknowledge that any contributions they provide will be made under the same open source license that the open source project is provided under. **
+
+

LICENSE.md

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2021 Twilio inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Sources/segmentcli/main.swift

@@ -1,3 +1,5 @@
+// Copyright 2021 Twilio Inc.
+
 import Foundation
 import SwiftCLI