Explicitly document that pod_read_unaligned and try_pod_read_unaligne… #476

Job	Run time
Test with miri	53s
Test on i686-unknown-linux-gnu with cross	1m 45s
Test with -Zsanitizer=address	54s
Test Rust 1.34.0 on ubuntu-latest	2m 0s
Test with -Zsanitizer=memory	47s
Test with -Zsanitizer=leak	43s
Test Rust stable on ubuntu-latest	16s
Test Rust beta on ubuntu-latest	13s
Test Rust nightly on ubuntu-latest	23s
Test Rust stable on macos-latest	24s
Test Rust stable on windows-latest	36s
Test Rust stable-x86_64-gnu on windows-latest	39s
Test Rust stable-i686-msvc on windows-latest	49s
Test Rust stable-i686-gnu on windows-latest	48s
	11m 10s

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