Updated samples to reference Feather latest version 1.7.600.0

Official release of Feather that is compatible with Telerik.Sitefinit…

…y 8.2.5900.0.

The Q4 2014 release of Feather that is compatible with Telerik Sitefi…

…nity 7.3.5600.0

Service Pack 1

Official release.

Alfa release