updated license headers in all source files

Author: Aaron Gonzales

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 
+Copyright (c) 2018 Twitter, 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

searchtweets/__init__.py

@@ -1,3 +1,6 @@
+# Copyright 2018 Twitter, Inc.
+# Licensed under the MIT License
+# https://opensource.org/licenses/MIT
 from .result_stream import ResultStream, collect_results
 from .api_utils import *
 from .utils import *

searchtweets/api_utils.py

@@ -1,4 +1,7 @@
 # -*- coding: utf-8 -*-
+# Copyright 2018 Twitter, Inc.
+# Licensed under the MIT License
+# https://opensource.org/licenses/MIT
 """
 Module containing the various functions that are used for API calls,
 rule generation, and related.

searchtweets/result_stream.py

@@ -1,4 +1,7 @@
 # -*- coding: utf-8 -*-
+# Copyright 2018 Twitter, Inc.
+# Licensed under the MIT License
+# https://opensource.org/licenses/MIT
 """
 This module contains the request handing and actual api wrapping functionality.
 

searchtweets/utils.py

@@ -1,6 +1,9 @@
 """
 Utility functions that are used in various parts of the program.
 """
+# Copyright 2018 Twitter, Inc.
+# Licensed under the MIT License
+# https://opensource.org/licenses/MIT
 
 from functools import reduce
 import itertools as it
@@ -22,8 +25,9 @@
 
 
 def take(n, iterable):
-    """Return first n items of the iterable as a list
-    
+    """Return first n items of the iterable as a list.
+    Originaly found in the Python itertools documentation.
+
     Args:
         n (int): number of items to return
         iterable (iterable): the object to select

tools/search_tweets.py

@@ -1,3 +1,6 @@
+# Copyright 2017 Twitter, Inc.
+# Licensed under the Apache License, Version 2.0
+# http://www.apache.org/licenses/LICENSE-2.0
 import os
 import argparse
 import json