Indev added/changed default.rule and more

Hier noch eine kurze Auflistung der Dinge die sich geändert haben:

- default.cat.lua
  - added Pod/Misc Cat
  - changed icon path for multimode engines to ramjet
  - added RCS-MonoProp Cat
  - added Adapter Cat
  - added Coupler Cat (leider bisher ohne Erfolg ,siehe issue)
  - added Cargo-Bay / -Compartment Cat
  - added Fairing Cat
  - changed icon path for Utility/Landing to parachute
  
- default.rule.lua
  - added Adapter Cat
  - added Coupler Cat (leider bisher ohne Erfolg,siehe issue)
  - added Cargo-Bay / -Compartment Cat
  - added RCS-MonoProp Cat
  - fixed a TYPO in Generator / Converter rule
  - added Converter Cat

- renamed KWRocketry.lua to KWRocketry.rule.lua
- changed icon paths for fairings and fairing-base inside KWRocketry- & ProceduralFairings.rule.lua
- added Lazor.rule.lua
- added AdvancedGenerators.rule.lu
- renamed some icons to fit the dynamic category-creation function

Das war es für das erste!