Visual Studio 2013 solution/project files

Background
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I am fixing various memory leak issues on a separate branch called [```Plumber```](https://github.com/Benglin/Dynamo/compare/Plumber). One of the obvious additions on the branch is ```Visual Studio 2013``` related solution/project files. The reason for those is that ```Visual Studio 2013``` provides a very nice memory profiler that allows managed heap debugging through sets of collected run-time dump files. This has an advantage over ```CLR Profiler``` tool because it works with ```dmp``` files instead of launching a predefined application. ```CLR Profiler``` could not pinpoint at the memory issue in scenarios like NUnit test runs, since ```nunit-console.exe``` spawns another ```nunit-agent.exe``` process *after* ```CLR Profiler``` is attached to the original ```nunit-console.exe``` (when the leaks are in ```nunit-agent.exe``` process).

This pull request is mainly to remove large chunks of difference shown on ```Plumber``` branch to make code review process easier.

Impacts
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This pull request does not affect other team members and the continuous integration, as it only adds new files to the repository.