Add codecov.io call to Travis file

.travis.yml

@@ -24,4 +24,7 @@ before_script:
     - psql prest -c 'create table test(name text);' -U postgres
 
 script:
-    - go test -v -race ./...
+    - sh test.sh
+
+after_success:
+    - bash <(curl -s https://codecov.io/bash)

coverage.txt

@@ -0,0 +1 @@
+

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