Added Help menu with several items
Added functions to launch various URLs associated with the Help menu
Renamed User Guide link to prevent confusion
Try to fix core data crashes on import again.
Merge pull request #966 from okdana/enhancement/help-menu-v1

Issue # 893: Add Help menu
Cleaning up after @okdana :P
Merge branch 'master' of https://github.com/loicloic/OpenEmu