add methodology docs for bandwidth test
add methodology docs for bandwidth test

lognormal/boomerang,yahoo/boomerang,sdgdsffdsfff/boomerang,forcedotcom/kylie,sdgdsffdsfff/boomerang,levexis/boomerang,levexis/boomerang,FredXue/boomerang,forcedotcom/kylie,FredXue/boomerang,lognormal/boomerang