exception documentation

Exception class used when a module can't be imported by astroid.

Inherited from AstroidBuildingError:

Method __init__ Undocumented
Instance Variable class_repr Undocumented
Instance Variable cls Undocumented
Instance Variable error Undocumented
Instance Variable modname Undocumented
Instance Variable path Undocumented
Instance Variable source Undocumented

Inherited from AstroidError (via AstroidBuildingError):

Method __str__ Undocumented
Instance Variable message Undocumented