Add MyGet gallery link to readme (#2376)

Closes #2251

Author: hazzik

README.md

@@ -11,7 +11,7 @@ including [howtos][A1], [blogs][A2] and [reference documentation][A3].
 [A2]: http://nhibernate.info/blog/
 [A3]: http://nhibernate.info/doc/nh/en/index.html
 
-Latest Version
+Latest Release Version
 --------------
 
 The quickest way to get the latest release of NHibernate is to add it to your project using 
@@ -22,6 +22,24 @@ Alternatively binaries are available from SourceForge at <http://sourceforge.net
 You are encouraged to review the release notes ([releasenotes.txt](releasenotes.txt)), particularly when upgrading to a 
 later version. The release notes will generally document any breaking changes.
 
+Nightly Development Builds
+--------------------------
+
+The quickest way to get the latest development build of NHibernate is to add it to your project using 
+NuGet from MyGet feed (<https://www.myget.org/gallery/nhibernate>).
+
+In order to make life a little bit easier you can register the package source in the NuGet.Config
+file in the top folder of your project, similar to the following.
+
+```xml
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <add key="NHibernateDevBuilds" value="https://www.myget.org/F/nhibernate/api/v3/index.json" />
+  </packageSources>
+</configuration>
+```
+
 Community Forums
 ----------------