Set vk_sampleshading to 0 also during global initialization.

Updated Vulkan Memory Allocator to 3.0.0-development (2020-11-03).

React to all errors returned by vkCreateSwapchainKHR().

Hide exclusive fullscreen setting in video menu on Windows if the dev…

…ice doesn't support it at all.

Store crosshair images in a separate scrap texture with S_NEAREST fil…

…tering - this fixes display issues for the dot crosshair and makes it look consistent across different scaling values.

Make sure to call SCR_FinishCinematic() only once to avoid lockups wh…

…en input queue is full.

Fixed Travis builds for MacOS and latest Vulkan SDK.

Always use lower API version in case the actual device cannot handle …

…what the application requested.

Don't rebuild entire window if Vulkan fails (fixes kondrak#95).

Merge pull request kondrak#89 from kondrak/music_volume (music volume…

… slider)

Added music volume slider. (fixes kondrak#88)