Evalg 81 - Adding content filtering C#

[xFrenchy]

Summary

EVALG-81

Details and comments

Adding content filtering C# to tutorial

Checks

• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.

Questions:

• For the Optional exercise of updating the filter, I added a third command line argument. (pub, sub, filter). Is this a good assumption?
• We state that the filter can now be changed at runtime, but the example doesn't truly show that. The filter gets changed to "Kitchen" and is only changed once, artificially. Should we update it so that the user gets to decide when a change happens and to what
• When creating the parameters, in C++11 you used a StringSeq. In C# it seems that I should have used a Rti.Types.Sequence but that is equivalent to a native List. So I used a List, is that alright?
• In the README, I state how to run the example, however in C++ README, I see that it simply says to see the tutorial for instructions. The tutorial doesn't have C# yet so I wasn't sure if I should repeat the same instructions (although it would be missing) or to add them to the README for now and update later?