* Use proc macros to generate conversion functions for MultiLocation
* Add compile test and missing conversion cases
* Add common derives for Parent and Ancestor
* Generate conversion functions for MultiLocation v0 via proc macro
* Add type conversion test and fix a bug
* cargo fmt
* Do not hardcode 8 as the number of max parents
* Use map instead of for loops when generating code fragments
* Spelling
* cargo fmt
* More mapping, less for-looping