* redesign for faster cpu/gpu synch
* load + more async CPU
* use command encoder API and move more ops to use it
* make fence back-end generic + CPU only fence
* faster build
* fix async eval
* fixes + handle temporaries
* fix / improve cpu conv
* remove unused status, fix siblings
* fix extensions
* fix
* fix no cpu build
* format
* comments
* fix perf regression, remove unecessary abort
* fix events, task limit cpu
* fix waiting
* fix donation / temporaries in normalization
* more async eval
* fix rebase
* try correct async eval
* fix async
* more tests for async eval
* use shared events for synchronization
* comment + cleanup
* with autorelease pool
* fix no metal build
* fix compile
* fix patch
* don't eval if asyn evale'd
* don't use is_evaled
* comments
* more multi stream tests
* try and cleanup use of is_evaled
* use a status flag
* Enable copy to work with int64 strides
* Fix uniform buffer indices or copy kernel arguments
* Update utils.h
* Remove manual unrolling of elem to loc loop
* GPU copy updated to handle negative strides
* Add slice update primitive