Small README adjustments  (#734)
Small README adjustments  (#734)

* Add links in Contributing section

* Add codetriage badge

* Fix codetriage badge

* Add missing period

* Use Contributors  instead of Helpers

* Moves Philosophy to his own section

* Move community section to the top

amberframework/amber,Amber-Crystal/amber,amberframework/amber,Amber-Crystal/amber,amberframework/amber