Add go test script and travis file

.gitignore

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+.idea
+coverage.txt

.travis.yml

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+language: go
+sudo: false
+go:
+  - 1.7
+  - 1.8
+  - tip
+
+before_install:
+  - go get -u -t ./...
+
+script:
+  - ./go.test.sh
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
+
+comment: off

go.test.sh

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+#!/usr/bin/env bash
+
+set -e
+echo "" > coverage.txt
+
+for d in $(go list ./... | grep -v vendor); do
+    go test -count 20 -v -race -coverprofile=profile.out -covermode=atomic $d
+    if [ -f profile.out ]; then
+        cat profile.out >> coverage.txt
+        rm profile.out
+    fi
+done