Create Filters.md

I think since there are more filters and to help keep things clearer and enable you to provide examples having filters and operators seperate in the reference would be better in my view.

I think the output would look better like this:
https://www.dropbox.com/s/422x3u6urdfr5pq/Screenshot%202014-10-28%2023.26.43.png?dl=0

NOTES 
- Work in progress, need to finish this
- Map for example would been proper output examples to be understood properly