Added Reportedly to the list of supported sites. Removed duplicate 'Trello' on README.

We :green_heart: emoji and direct users to your cheat sheet all the time in [Reportedly](http://reportedly.co). 

I added our app to the end of the 'supported sites' on the README and the index page. I noticed that 'Trello' was listed twice on the README section, so I deleted the duplicate.

Thanks for hosting the cheat sheet and for including us (if you do)!

:rocket: 
:sparkles: