Standardized build and updated README.md

Fixed rakefile's use of compile_target.

Finished updating the rakefile to use the standardized build process for
Mvba and added necessary supporting files (Ruby_Not_Installed.txt, etc).

Cleaned up the README.md including links in the License section.

Updated dependent dlls:

Updated FluentAssert to 1.0.0.3
Updated MvbaCore to 1.0.0.1