Add From<Bitmap> for Bitmap64 #372

Job	Run time
Test on ubuntu-latest using Rust stable with features ''	32s
Test on ubuntu-latest using Rust stable with features 'alloc'	31s
Test on ubuntu-latest using Rust stable with features 'default'	58s
Test on ubuntu-latest using Rust nightly with features ''	37s
Test on ubuntu-latest using Rust nightly with features 'alloc'	41s
Test on ubuntu-latest using Rust nightly with features 'default'	3m 21s
Test on windows-latest using Rust stable with features ''	1m 28s
Test on windows-latest using Rust stable with features 'alloc'	3m 21s
Test on windows-latest using Rust stable with features 'default'	3m 3s
Test on windows-latest using Rust nightly with features ''	2m 21s
Test on windows-latest using Rust nightly with features 'alloc'	2m 12s
Test on windows-latest using Rust nightly with features 'default'	4m 14s
Test on macos-latest using Rust stable with features ''	34s
Test on macos-latest using Rust stable with features 'alloc'	1m 0s
Test on macos-latest using Rust stable with features 'default'	46s
Test on macos-latest using Rust nightly with features ''	50s
Test on macos-latest using Rust nightly with features 'alloc'	57s
Test on macos-latest using Rust nightly with features 'default'	1m 45s
	29m 11s

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