Add coverage script to project

.gitignore

@@ -0,0 +1 @@
+.cover

README.md

@@ -3,3 +3,6 @@
 **allot** is a small library to parse and define strings with placeholders and check if others strings are matching the defined string. This can be useful when using a command line tool, writing a slack bot or some other crazy ideas …
 
 See the [hanu Slackbot](https://github.com/sbstjn/hanu) framework for a usecase for **allot**.
+
+## Credits
+ * [Go coverage script from Mathias Lafeldt](https://mlafeldt.github.io/blog/test-coverage-in-go/)

script/covarage

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+#!/bin/sh
+# Generate test coverage statistics for Go packages.
+#
+# Works around the fact that `go test -coverprofile` currently does not work
+# with multiple packages, see https://code.google.com/p/go/issues/detail?id=6909
+#
+# Usage: script/coverage [--html|--coveralls]
+#
+#     --html      Additionally create HTML report and open it in browser
+#     --coveralls Push coverage statistics to coveralls.io
+#
+
+set -e
+
+workdir=.cover
+profile="$workdir/cover.out"
+mode=count
+
+generate_cover_data() {
+    rm -rf "$workdir"
+    mkdir "$workdir"
+
+    for pkg in "$@"; do
+        f="$workdir/$(echo $pkg | tr / -).cover"
+        go test -covermode="$mode" -coverprofile="$f" "$pkg"
+    done
+
+    echo "mode: $mode" >"$profile"
+    grep -h -v "^mode:" "$workdir"/*.cover >>"$profile"
+}
+
+show_cover_report() {
+    go tool cover -${1}="$profile"
+}
+
+push_to_coveralls() {
+    echo "Pushing coverage statistics to coveralls.io"
+    /home/ubuntu/.go_workspace/bin/goveralls -coverprofile="$profile" -service=circle-ci -repotoken=$COVERALLS_REPO_TOKEN
+}
+
+generate_cover_data $(go list ./...)
+show_cover_report func
+case "$1" in
+"")
+    ;;
+--html)
+    show_cover_report html ;;
+--coveralls)
+    push_to_coveralls ;;
+*)
+    echo >&2 "error: invalid option: $1"; exit 1 ;;
+esac