Merge remote-tracking branch 'remotes/alexparlett/feature/pooled-work-queue'
Acquire event data for work item completion only when necessary. These are pooled by the Context so it shouldn't hurt performance.
Added a square Urho icon (same as the Android icon) to use for the samples on desktop.
Added Development Base. This sets Debug Information for Debug Builds to /C7 and none on Release Builds. Modifies the install settings and ignore flag as well.
Modified Sound to provide its own unique category for UI sounds
Set Texture and Material Quality / AF parameters during startup from Engine Parameters.