Server: Accelerator in 2.2.0 doesn't build

[pkeuter]

Looking at the other issues, I'm pretty sure @ronag is working hard on this already. But just in case:

The accelerator project in 2.2.0 doesn't seem to build with VS2015. One of the reasons is that device.cpp is referencing asio.hpp in common and there is only a asio.h-file. When I change it, the build still fails. dispatch_async is not found, I think because the accelerator is in another namespace and it should be caspar::dispatch_async. And more of the like.

[krzyc]

Yes, there are more issues related to OpenGL refactoring and this affects GCC too. @ronag mentioned in another issue that something not ready was pushed - maybe this is related.

[ronag]

Sorry, I'm working on resolving this.

[ronag]

Should be esolved.