Bring to agreement with php-sweph

[aloistr]

There is an excellent php binding for Swiss Ephemeris, which I started to be involved with recently.
See https://github.com/cyjoelchen/php-sweph
It might be a good idea to bring the API of this node project into agreement with it.
The php functions return most often an associative array, which is modt often a flat structure with named fields.
I think it would be a good idea if the node version would use exactly the same type of return object with the same field names.
Some simple functions return only a single number or string.
An identical API for both php and node could be a big advantage.