changed version in nuspec to 1.4.0.0

Author: chester89

src/FluentNHibernate.nuspec

@@ -2,7 +2,7 @@
 <package xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <metadata xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
     <id>FluentNHibernate</id>
-    <version>1.4.0-alpha</version>
+    <version>1.4.0.0</version>
     <authors>James Gregory and contributors</authors>
     <owners>jagregory, chester89</owners>
     <licenseUrl>http://github.com/jagregory/fluent-nhibernate/blob/master/LICENSE.txt</licenseUrl>