* Splitting checkurl into two functions, one to check availability, the other for booking
* [fix] move import at file's beginning.
* Rename bookurl to registerurl
* Set registerurl as a PUT request for the api
* urlavailable returns a boolean now
* Revert moving import to top of file :/
* Have domain and path as separate arguments
* Flagging checkurl as deprecated in the actionmap
* Adding unit tests for registerurl and related
* Using built-in deprectation mechanism of Moulinette
* Using - separator in names + moving url-available to domain
* Returning directly a bool in url-available
