massive refactoring to switch from camelCase to snake_case:

historically, Libervia (SàT before) was using camelCase as allowed by PEP8 when using a
pre-PEP8 code, to use the same coding style as in Twisted.

However, snake_case is more readable and it's better to follow PEP8 best practices, so it
has been decided to move on full snake_case. Because Libervia has a huge codebase, this
ended with a ugly mix of camelCase and snake_case.

To fix that, this patch does a big refactoring by renaming every function and method
(including bridge) that are not coming from Twisted or Wokkel, to use fully snake_case.

This is a massive change, and may result in some bugs.

sat/test/test_memory_crypto.py

@@ -28,7 +28,7 @@ import string
 from twisted.internet import defer
 
 
-def getRandomUnicode(len):
+def get_random_unicode(len):
     """Return a random unicode string"""
     return "".join(random.choice(string.letters + "éáúóâêûôßüöä") for i in range(len))
 
@@ -47,9 +47,9 @@ class CryptoTest(helpers.SatTestCase):
             d_list.append(d)
 
         for key_len in (0, 2, 8, 10, 16, 24, 30, 32, 40):
-            key = getRandomUnicode(key_len)
+            key = get_random_unicode(key_len)
             for message_len in (0, 2, 16, 24, 32, 100):
-                message = getRandomUnicode(message_len)
+                message = get_random_unicode(message_len)
                 test(key, message)
         return defer.DeferredList(d_list)
 
@@ -62,7 +62,7 @@ class CryptoTest(helpers.SatTestCase):
                 d1 = PasswordHasher.verify(password, hashed)
                 d1.addCallback(lambda result: self.assertTrue(result))
                 d_list.append(d1)
-                attempt = getRandomUnicode(10)
+                attempt = get_random_unicode(10)
                 d2 = PasswordHasher.verify(attempt, hashed)
                 d2.addCallback(lambda result: self.assertFalse(result))
                 d_list.append(d2)