CSHARP-934: reorganizing repository. Moved all source files into src folder and all build related files into build folder.

moved GlobalAssemblyInfo.cs and TestEnvironment.cs into shared folder.
CSHARP-934: adjusting build script to accomodate new repository structure.
CSHARP-616: removed strong naming and removed the keys.
 upgraded projects to VS2013
CSHARP-625: changed projects to target .NET 4.5. Will add in compilation constants for 4.5 specific features to allow us to target 4.0 during builds.
CSHARP-625: build script now builds both .NET 4.0 and .NET 4.5. Still need to update the docs project and the installer project.
CSHARP-625: upgraded installer to handle both .NET 4.0 and .NET 4.5 binaries.
fixed regex for finding build number.
CSHARP-934: renamed test assemblies to *.Tests.
CSHARP-934: changed default namespace and namespaces for all test files.
Fixed unit tests that were affected by the namespace changes.