Add pexpect-2.3 to third_party

third_party/pexpect/LICENSE

Index: third_party/pexpect/LICENSE
diff --git a/third_party/pexpect/LICENSE b/third_party/pexpect/LICENSE
new file mode 100644
index 0000000000000000000000000000000000000000..e61144381c73da8dd2880ee727a8cf16b69b12dc
--- /dev/null
+++ b/third_party/pexpect/LICENSE
@@ -0,0 +1,21 @@
+Free, open source, and all that good stuff.
+Pexpect Copyright (c) 2008 Noah Spurrier
+
+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.
+