ADDED: Rendering - Scaling swap chain down, if required.
REMOVED: Project - Obsolete device resources class and its references.
CHANGED: Project - Cleaned up step timer and DirectX utility methods and moved them to PinnedDownClient::Util namespace.
REMOVED: Project - Obsolete input manager and sound player classes and their references.
ADDED: Sound - Changing sounds at different volume and looping sounds.
Merge branch 'feature/project-cleanup' into develop