bench : fix Windows linkage by moving ggml benches in whisper lib ..

bench : add memcpy and ggml_mul_mat benchmarks

whisper : add loader class to allow loading from buffer and others (#353)

cmake : update to 3.19 (#351)

cmake : enable and fix -Wall -Wextra -Wpedantic C++ warnings

bench.wasm : same as "bench" but runs in the browser (#89)

refactoring : more readable code

Print system info at start of program

Print system info in main

Update README.md

Update README.md

ggml : add system info functions

refactoring : move main + stream in examples + other stuff