Add `README.md`

README.md

@@ -0,0 +1,38 @@
+# Jira Client
+
+A small and very incomplete Jira client library.
+
+## Installation
+
+```shell
+go get git.jasperbok.nl/jasperbok/jiraclient.git
+```
+
+## Usage
+
+```go
+package main
+
+import (
+	"fmt"
+	"log"
+	"git.jasperbok.nl/jasperbok/jiraclient.git"
+)
+
+jira := jiraclient.NewJiraClient("username", "token", "atlassian.net_subdomain")
+issue, err := jira.GetIssue("ABC-12")
+if err != nil {
+	log.Fatal(err)
+}
+fmt.Printf("%s\n", issue.Summary)
+```
+
+## API
+
+### `NewJiraClient(string, string, string) JiraClient`
+
+### `JiraClient.GetIssue(string) (Issue, error)`
+
+### `JiraClient.GetProject(string) (Project, error)`
+
+### `JiraClient.Search(string) ([]Issue, error)`