Switch driver to ArangoDB-PHP-Core

[F21]

Switch underlying driver to Frank Mayer's ArangoDB-PHP-Core.

[frankmayer]

Hi Francis,
keep in mind it's still experimental and there will still be some changes in the next couple of weeks... 😄

[F21]

@frankmayer It's looking great at the moment! Hopefully I will find some time over the next few weeks to help move ArangoDB-PHP to the core driver as well! 😄

[frankmayer]

That would be great!! 😄
I'll be progressing the core more frequently now that the basic skeleton is there. I did do a lot of different approaches and some benchmarking etc etc.. and finally got to this design. I am still thinking to maybe drop some of the DI in favor of traits.
Let's see...I'll be doing some testing in the next few days.
Time to sleep now, it's been a long day 😄