Implement (Scalar +-*/ Array)

[ctrl-z-9000-times]

Hi @9prady9,

I implemented the overloaded operators as you suggested. I don't know what your testing standards are, so I've only done a minimal amount of testing by hand.

Also, it turns out that the function which I previously tried to add (scalar) is already implemented as the convert function, so I could have made the equation 1 / Array work with 1.convert() / Array

I hope this helps!

[9prady9]

Thank you! I don't test full breath of ArrayFire functionality in this wrapper since upstream takes care of it. But I do want to eventually test wrapper calls; Having said that, current tests are doc tests that are written as example codes in each function's documentation - so if you add some example code on how to use the new feature you added. That will check the wrapper call - which should be sufficient for now.

Can you please remove the merge commit. You can avoid such issues if a new feature/bug branch is created on your fork based on upstream's(repo on arrayfire account not your fork) master instead of using your fork's master.