Change coveralls and README badge to use circleci

Makefile

@@ -58,7 +58,7 @@ cover:
 
 coveralls:
 	./cover.sh
-	goveralls -coverprofile=coverage.out -service=travis-ci
+	goveralls -coverprofile=coverage.out -service=circle-ci -repotoken=$(COVERALLS_TOKEN)
 
 junit-test: build
 	go test -v ./... | go-junit-report > test-report.xml
@@ -71,8 +71,6 @@ check-all:
 	go install ./cmd
 	golangci-lint run --enable=gocyclo --concurrency=$(GOLANGCI_LINT_CONCURRENCY) --deadline=600s
 
-travis-checks: build test-race check bench-race
-
 docker:
 	docker build -t $(IMAGE_NAME):$(GIT_HASH) . $(DOCKER_BUILD_FLAGS)
 

README.md

@@ -1,4 +1,4 @@
-[![Build Status](https://api.travis-ci.com/jtblin/kube2iam.svg?branch=master)](https://app.travis-ci.com/github/jtblin/kube2iam)
+[![CircleCI](https://dl.circleci.com/status-badge/img/circleci/Tv5Xa331HXLx98iuW72Ug4/Po3PqWxjiikmpntHfiZoXW/tree/master.svg?style=svg)](https://dl.circleci.com/status-badge/redirect/circleci/Tv5Xa331HXLx98iuW72Ug4/Po3PqWxjiikmpntHfiZoXW/tree/master)
 [![GitHub tag](https://img.shields.io/github/tag/jtblin/kube2iam.svg?maxAge=86400)](https://github.com/jtblin/kube2iam)
 [![Docker Pulls](https://img.shields.io/docker/pulls/jtblin/kube2iam.svg)](https://hub.docker.com/r/jtblin/kube2iam/)
 [![Go Report Card](https://goreportcard.com/badge/github.com/jtblin/kube2iam)](https://goreportcard.com/report/github.com/jtblin/kube2iam)