Fix log4net configuration
Avoid to read settings from adapter ctor because composition is not over
Read plugin settings from BasePluginsDirectory and all sub-directories
Refactor MEFInterception to inject ISettings through ctor
Refactoring to remove code duplication, simplify and rename
Merge pull request #22 from laurentkempe/issue/11-copy-settings

Issue/11 copy settings  (fixes #11)