Help system

[fireclawthefox]

Implement a way to introduce functions to the user in an unobtrusive way.

Notes:

1. Help system should not block the user from doing things
2. Should be shown whenever something new comes up
   1. store shown help notes to not show them again
   2. Make it possible to reset them from the settings menu
3. Can simply be enabled/disabled
4. Should show enough basic details on startup to make the user able to control the application and find anything he wants