Adds build files and readme's for third party python libraries.

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MOS_MIGRATED_REVID=94001567

third_party/py/concurrent/BUILD

diff --git a/third_party/py/concurrent/BUILD b/third_party/py/concurrent/BUILD
new file mode 100644
index 0000000..5a9d3cf
--- /dev/null
+++ b/third_party/py/concurrent/BUILD
@@ -0,0 +1,7 @@
+licenses(["notice"])
+
+py_library(
+    name = "futures",
+    srcs = glob(["**/*.py"]),
+    visibility = ["//visibility:public"],
+)

third_party/py/concurrent/README.md

diff --git a/third_party/py/concurrent/README.md b/third_party/py/concurrent/README.md
new file mode 100644
index 0000000..9973ba0
--- /dev/null
+++ b/third_party/py/concurrent/README.md
@@ -0,0 +1,8 @@
+[concurrent](https://github.com/agronholm/pythonfutures)
+--------
+
+Backport of the concurrent.futures package from Python 3.2, version 2.1.2
+
+* Version: 2.1.2
+* License: BSD License
+* From: [http://pypi.python.org/packages/source/f/futures/futures-2.1.2.tar.gz](http://pypi.python.org/packages/source/f/futures/futures-2.1.2.tar.gz)

third_party/py/gflags/BUILD

diff --git a/third_party/py/gflags/BUILD b/third_party/py/gflags/BUILD
new file mode 100644
index 0000000..6e475ab
--- /dev/null
+++ b/third_party/py/gflags/BUILD
@@ -0,0 +1,10 @@
+licenses(["notice"])
+
+py_library(
+    name = "gflags",
+    srcs = [
+        "__init__.py",
+        "gflags_validators.py",
+    ],
+    visibility = ["//visibility:public"],
+)

third_party/py/gflags/README.md

diff --git a/third_party/py/gflags/README.md b/third_party/py/gflags/README.md
new file mode 100644
index 0000000..da2a03f
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+++ b/third_party/py/gflags/README.md
@@ -0,0 +1,6 @@
+[gflags](https://python-gflags.googlecode.com)
+--------
+
+* Version: 2.0
+* License: New BSD License
+* From: [https://python-gflags.googlecode.com/files/python-gflags-2.0.tar.gz](https://python-gflags.googlecode.com/files/python-gflags-2.0.tar.gz)

third_party/py/mock/BUILD

diff --git a/third_party/py/mock/BUILD b/third_party/py/mock/BUILD
new file mode 100644
index 0000000..5cf52f6
--- /dev/null
+++ b/third_party/py/mock/BUILD
@@ -0,0 +1,7 @@
+licenses(["notice"])
+
+py_library(
+    name = "mock",
+    srcs = ["__init__.py"],
+    visibility = ["//visibility:public"],
+)

third_party/py/mock/README.md

diff --git a/third_party/py/mock/README.md b/third_party/py/mock/README.md
new file mode 100644
index 0000000..26a0707
--- /dev/null
+++ b/third_party/py/mock/README.md
@@ -0,0 +1,6 @@
+[mock](http://www.voidspace.org.uk/python/mock/)
+--------
+
+* Version: 1.0.1
+* License: BSD License
+* From: [http://pypi.python.org/packages/source/m/mock/mock-1.0.1.tar.gz](http://pypi.python.org/packages/source/m/mock/mock-1.0.1.tar.gz)