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/tools/common/data_format.py

@@ -107,7 +107,7 @@ def iter2dict(name, iter_, dict_=None, check_conflict=True):
     return dict
 
 
-def getSubDict(name, dict_, sep="_"):
+def get_sub_dict(name, dict_, sep="_"):
     """get a sub dictionary from a serialised dictionary
 
     look for keys starting with name, and create a dict with it