Updated documentation a bit

[release]

README.md

@@ -4,3 +4,13 @@ This is a simple REST based JIRA client, written for Greenshot, by using Dapplo.
 - Current build status: [![Build status](https://ci.appveyor.com/api/projects/status/d78ubenwypiwg3j4?svg=true)](https://ci.appveyor.com/project/dapplo/dapplo-jira)
 - Coverage Status: [![Coverage Status](https://coveralls.io/repos/github/dapplo/Dapplo.Jira/badge.svg?branch=master)](https://coveralls.io/github/dapplo/Dapplo.Jira?branch=master)
 - NuGet package: [![NuGet package](https://badge.fury.io/nu/Dapplo.Jira.svg)](https://badge.fury.io/nu/Dapplo.Jira)
+
+This client has support for:
+* Issue (get / comment)
+* Attachments (delete, upload & download)
+* Basic authorization, OAuth & session (via cookie)
+* Search
+* Information on projects, transitions and users
+* Avatar & Issue type 
+
+More to come.