hkxc v0.1.0

Experimental CLI

GPL last version 0.0.0

Fix dependencies, license(GPL violation) & remove GPL crate

GPL tainted because rhexdump crate was GPL.

Next, license check and dependency check by cargo-deny are performed to remove GPL crates.

The last commit eliminates all GPL dependencies.

But since the git object contains the GPL, we rewrite the history completely after eliminating the GPL code at the end of this, just in case.

#2