Evaluate which features we want to keep or remove

[vabold]

Already, we are starting to introduce features that invalidate features outside of the scope of this project (e.g. #26). Netplay is certainly an uncontroversial removal for a TAS-focused emulator, and it may be worthwhile to eliminate other features from this fork. This could lead to reduced build times with the removal of entire files (assuming compilation errors that would arise are fixed), simplify the UI, etc.

There are a few questions here:

1. Is this a good precedent to set forward?
2. What is the full scope of Dolphin's feature set?
3. Do we remove these files from the project entirely or simply remove the option for them to be selected?