Enabled NuGet package restore on solution.
Modified solution to support targeting .NET 3.5, .NET 4.0, and .NET 4.5. Created PowerShell script to build and package multi-targeted assemblies with NuGet.
Added script to patch the a CommonAssemblyInfo file for all projects so they are versioned simultaneously in a semantic version friendly way. Moved the BoboBrowse.snk file to a common location so both BoboBrowse.Net and LuceneExt.Net project can use it for strong naming.