Add information about Amaliant's commercial support

git-svn-id: https://svn.apache.org/repos/asf/servicemix/website/trunk@1454298 13f79535-47bb-0310-9956-ffa450edef68
Add information about 4.5.1-SNAPSHOT downloads to the website

git-svn-id: https://svn.apache.org/repos/asf/servicemix/website/trunk@1454299 13f79535-47bb-0310-9956-ffa450edef68