Python 2 support (#11)

* consistency of output in python 2

print("string") and print "string" have the same behavior in Python 2 and 3, but print("string", "string") will print a tuple in Python 2

* Add requirement

Update readme to include info on the one required library, requests, including a pip install command.

README.md

@@ -1,6 +1,11 @@
 # pwned-search
 Pwned Password API lookup
 
+
+- Required libaries:
+
+* requests: `pip install requests`
+
 Usage:
 
 * `python pwned.py` – reads passwords from standard input;

pwned.py

@@ -41,11 +41,11 @@ def main(args):
         pwd = pwd.strip()
         sha1pwd, count = lookup_pwned_api(pwd)
         if count:
-            print(pwd, "was found")
+            print("{} was found".format(pwd))
             print("Hash {0}, {1} occurrences".format(sha1pwd, count))
             ec = 1
         else:
-            print(pwd, "was not found")
+            print("{} was not found".format(pwd))
     return ec