The keys are github auth_tokens and are assigned to yuzubot for the
yuzu-nightly repository to allow Appveyor and Travis to upload releases

Adds a cmake custom target that will build unicorn on first compile and
uses this in the build scripts as well. Updates Appveyor and Travis
build scripts to work with the new unicorn build, and updates the paths
to all of the different artifacts.

Updated Discord link to match website.

CMakeList.txt: rename CITRA to YUZU 

CMake: Output binaries to bin/

Various fixes

HID Sharedmem Impl Start

vi: Add IManagerDisplayService::CloseDisplay function

Fix build for gcc c++17 / boost.icl incompatibility

Changed ICommonStateGetter::ReceiveMessage to allow further execution in games