Backhand SquashFS library 0.11.0 release

backhand squashfs library release: v0.11.0!​

Support for non-standard squashfs images added! Why not have big-endian v4? Why not have mixed big-endian and little-endian structs?

FilesystemWriter and Reader API has been re-done, with more examples and a better builder pattern that ensure values are set correctly!

The unsquashfs binary has been improved, and now completely matches the behaviour of normal unsquashfs

Compression options ....and much more!