New major version

This new version brings some major changes to the updater:

• The advanced Scheduler API was removed
  • The two simple schedule mechanism stayed
    • delay with optional repetition
    • timepoint
    • the simple schedules won't be saved anymore
  • All the UpdateTask stuff was removed
• Added DialogMaster submodule for improved dialogs
• Some renamings
  • mainly from "getSomething()" to "something()"
• Made the UpdaterButton widget public
  • new class, can be simply created as any other widgets
  • added a bunch of new functions for this remastered class
  • removed the "createUpdatePanel" function due to this changes
• Documentation updates
• output now uses it's own logging category
• a bunch of internal stuff, mainly improvements, fixes