initial commit
Readme file
Update README.md

+link to Request Builder
fix date column type of refdomains_new_lost* tables
Fixed "having" fields for "backlinks_new_lost_counters"
Merge branch 'master' of https://github.com/ahrefs/ahrefs-php-api-client
Added getURL method to get the API URL string from param array
added where_subdomain support
restore AhrefsAPI.php
Merge branch 'master' of https://github.com/ahrefs/ahrefs-php-api-client