Updated README

Author: mabako

README.md

@@ -2,3 +2,51 @@ Git.hub
 =======
 
 A simple API in terms of querying github with C#, based on RestSharp.
+
+Usage
+-----
+
+### Create a client instance
+```csharp
+using Git.hub;
+Client client = new Client();
+```
+
+### login
+OAuth token:
+```csharp
+client.setOAuth2Token("0fd...");
+```
+
+Username and Password:
+```csharp
+client.setCredentials("mabako", "super duper password");
+```
+
+Retrieve the currently logged in user:
+```csharp
+User user = client.getUser();
+```
+
+
+### fetch repositories
+```csharp
+IList<Repository> repos = client.getRepositories("mabako");
+IList<Repository> orgRepos = client.getOrganizationRepositories("github");
+
+Repository pluginSource = client.getRepository("mabako", "Git.hub");
+
+/* Requires login */
+IList<Repository> ownRepos = client.getRepositories();
+```
+
+### repository actions
+Fork the repo:
+```csharp
+Repository forked = pluginSource.CreateFork();
+```
+
+List branches:
+```csharp
+IList<Branch> branches = pluginSource.GetBranches();
+```