Code cleanup

[TrojanerHD]

• [x] Add documentation
• [x] Close #36
• [x] Close #38
• [x] Close #39
• [x] Remove unused classes
• [x] Add more types
• [x] Remove unused imports
• [x] Use async / await where it works better than callbacks
• …

[TrojanerHD]

If more untyped variables or return values will be found, new issues can be opened but for now, no further instances have been found