Add pexpect-2.3 to third_party

third_party/pexpect/README

+Pexpect is a Pure Python Expect-like module
+
+Pexpect makes Python a better tool for controlling other applications.
+
+Pexpect is a pure Python module for spawning child applications; controlling
+them; and responding to expected patterns in their output. Pexpect works like
+Don Libes' Expect. Pexpect allows your script to spawn a child application and
+control it as if a human were typing commands.
+
+Pexpect can be used for automating interactive applications such as ssh, ftp,
+passwd, telnet, etc. It can be used to a automate setup scripts for
+duplicating software package installations on different servers. It can be
+used for automated software testing. Pexpect is in the spirit of Don Libes'
+Expect, but Pexpect is pure Python. Unlike other Expect-like modules for
+Python, Pexpect does not require TCL or Expect nor does it require C
+extensions to be compiled. It should work on any platform that supports the
+standard Python pty module. The Pexpect interface was designed to be easy to use.
+
+If you want to work with the development version of the source code then please
+read the DEVELOPERS document in the root of the source code tree.
+
+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.
+
+Noah Spurrier
+http://pexpect.sourceforge.net/
+