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/plugins/plugin_misc_uri_finder.py

@@ -51,7 +51,7 @@ class URIFinder(object):
     def __init__(self, host):
         log.info(_("URI finder plugin initialization"))
         self.host = host
-        host.bridge.addMethod("URIFind", ".plugin",
+        host.bridge.add_method("uri_find", ".plugin",
                               in_sign='sas', out_sign='a{sa{ss}}',
                               method=self.find,
                               async_=True)