[new] (breaking) Remove mapping for ldap_get_attributes()
[dev] Remove mapping for ldap_get_option() - this is handled in a dedicated method
[dev] Remove method mappings that I am not going to implement
[new] (breaking) Remove mapping for ldap_get_entries() - not needed, data is extracted automatically
[dev] Update README
[new] Improve error description when calling an undefined method on the Ldap class
[new] Create method mappings for functions that don't require a resource