Rename all modules to comply with PEP8

Lowercase with underscores

Houdini/Plugins/__init__.py

@@ -1,33 +0,0 @@
-from abc import ABC
-from abc import abstractmethod
-
-
-class IPlugin(ABC):
-    """
-    Plugin interface which all plugins *must* implement.
-    """
-
-    @property
-    @abstractmethod
-    def author(self):
-        """The plugin's author which is usually a nickname and an e-mail address."""
-
-    @property
-    @abstractmethod
-    def version(self):
-        """The version of the plugin."""
-
-    @property
-    @abstractmethod
-    def description(self):
-        """Short summary of the plugin's intended purpose."""
-
-    @abstractmethod
-    async def ready(self):
-        """
-        Called when the plugin is ready to function.
-        """
-
-    @abstractmethod
-    def __init__(self, server):
-        self.server = server