New functions, breaking changes

- Renamed `norm` to `normalize`, added alias for `norm`
- Renamed `copy` to `clone`
- Added `copy`, `copyX`, `copyY`
- Added `horizontalAngle` and `verticalAngle` and aliases and helpers to convert to degrees
- Added `rotate` and `rotateBy` and helpers for degrees
- Added `magnitude` alias for `length`
changed documentation link
version bump