Update README documentation.
Update README documentation.

JackSullivan/spire,guersam/spire,rklaehn/spire,woparry/spire,kevinmeredith/spire,adampingel/spire,non/spire,kevinmeredith/spire,siddhartha-gadgil/spire,tixxit/spire,codeaudit/spire,codeaudit/spire,siddhartha-gadgil/spire,rklaehn/spire,non/spire,tixxit/spire,JackSullivan/spire,guersam/spire,AlecZorab/spire,adampingel/spire,woparry/spire,AlecZorab/spire