Add companion API.

companion.py

@@ -0,0 +1,20 @@
+from edmc import companion as c
+import platform
+import easygui
+
+companion_session = companion.Session()
+
+def login(username, password):
+  try:
+    companion_session.login(username, password)
+  except companion.VerificationRequired:
+    if platform.system() == 'Windows':
+      code = easygui.enterbox("Input Verification Code (check your email)",
+                              "Verification Required")
+    else:
+      code = raw_input("Input Verification Code (check your email): ")
+      companion_session.verify(code)
+
+
+def get_data():
+  return companion_session.query()