New: Add Examples for Remote Event Handlers using REST APIs

[amrfouad22]

I'm proposing adding new set of powershell scripts to get,register and delete remote event handlers for Project online.

I have the example ready.
Amr

[cameronsibbald]

I for one would love to see these remote event handler scripts

[amrfouad22]

@cameronsibbald I'll share this on another repo soon, this one seems to be not that active I presume !