Geometric test whether ray intersects sphere

[becheran]

Added this feature since I needed it myself for another project where I use Pyrr. Thought it makes sense to add it here.
Function return list of intersection points (possible 0 to 2) calculated via quadratic equation solver added to misc.

[adamlwgriffiths]

There's a bit of syntax touching in there. Is that a PEP-8 formatter?
Most of it is fine, but there are a couple that are off:
6c21afd#diff-a1fa0401c2195fa7c8fd9dce2c6c4000R77
6c21afd#diff-c2907d153021da1cec3549a759ba733fR7

Admittedly this library isn't PEP8 formatted, it originates from before I knew of it. I just haven't had a need to update it but I am happy to. However, it would be better if we could do a PEP8 separately.
Would you mind reducing this to just the code changes?

Apart from that, looks good. Thanks for including tests.
If you can undo the syntax we can do the merge.

[adamlwgriffiths]

Created #84 to cover syntax changes.

[becheran]

Yes sure. Sorry for useless overriding of original format.
Removed those sections from commit.
I am using Pycharm with an PEP 8 auto-formatter. If you want I can re-format the code and assign myself to #84.

[adamlwgriffiths]

Sorry been busy, hopefully I'll get some time to look soon.
Appreciate it's not a big change.

[becheran]

Sorry for very(!) late reply to this small issue. Branch should be clean now.

[adamlwgriffiths]

Nice man, thanks for coming back and doing that =)
Those changes aren't pointless, the code needs a spring clean, but I just want to keep things atomic.

[adamlwgriffiths]

We should add you to the contributors too. Is that ok with you to put your name in the authors section?

[becheran]

Thanks man. Of course, would be nice. Just add me.
I will hopefully find the time to contribute more.