Renames the NFluent initial project into NFluent.35

Targets the .NET 3.5 framework instead of the 3.5 client edition.
Moves the NFluent project into a  NFluent.35 folder.
Adds files as link within the NFluent.40 project.
Gets rid of useless files.
First test on a dynamic within NFluent ;-)
Removes the useless That() method on dynamic

Slightly changes the dynamic unit test.
Adds as link the AssemblyInfo.cs coming from NFluent.35 within the NFluent.40 project.