Add build/coverage badge. Update travis config to have code coverage.

Author: jeremy-clerc

.travis.yml

@@ -1,3 +1,13 @@
 language: go
+sudo: false
 go:
-  - 1.x
+  - 1.x
+
+before_install:
+  - go get -t -v ./...
+
+script:
+  - ./test.sh
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

README.md

@@ -1,3 +1,7 @@
+[![Build
+Status](https://travis-ci.org/google/easypki.svg?branch=master)](https://travis-ci.org/google/easypki)
+[![codecov](https://codecov.io/gh/google/easypki/branch/master/graph/badge.svg)](https://codecov.io/gh/google/easypki)
+
 easypki
 ======
 

test.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -e
+echo "" > coverage.txt
+
+for d in $(go list ./... | grep -v vendor); do
+    go test -race -coverprofile=profile.out -covermode=atomic $d
+    if [ -f profile.out ]; then
+        cat profile.out >> coverage.txt
+        rm profile.out
+    fi
+done