[#145] Reformat rest of crypto package for PEP-8.

Author: todofixthis

iota/crypto/__init__.py

@@ -1,17 +1,15 @@
 # coding=utf-8
 from __future__ import absolute_import, division, print_function, \
-  unicode_literals
-
+    unicode_literals
 
 # Load curl library.
 # If a compiled c extension is available, we will prefer to load that;
 # otherwise fall back to pure-Python implementation.
 # https://pypi.python.org/pypi/PyOTA-CCurl
 try:
-  from ccurl import *
+    from ccurl import *
 except ImportError:
-  from .pycurl import *
-
+    from .pycurl import *
 
 FRAGMENT_LENGTH = 2187
 """
@@ -23,7 +21,7 @@
 
 
 class SeedWarning(Warning):
-  """
-  Warning for inappropriate seeds.
-  """
-  pass
+    """
+    Warning for insecure or otherwise inappropriate seeds.
+    """
+    pass