Renamed LilyPond proxy class.

    lilypondproxytools.LilyPondGrobOverrideComponentPlugIn ==>
    lilypondproxytools.LilyPondGrobManager

Changes were made successfully with refactored "ajv rename".
Renamed LilyPond proxy class.

    lilypondproxytools.LilyPondContextSettingComponentPlugIn ==>
    lilypondproxytools.LilyPondSettingManager
Merged in changes that insure the existence of _static doc directory.

Merged while working on experimental path drama.