Bump version to 0.3.0-beta1, update README and (hopefully) fix build for older versions of libcryptsetup

* Add FFI tests using ctest

Solution: Right-trim error messages before logging

Solution: Pass passphrase/key as a `*const u8` directly

This should be safe given that libcryptsetup uses the provided length
rather than calling `strlen` on the given string.

Also one of those times where you wake up to a blindingly obvious bug...

Solution: Create a type alias

Also upgrade all deps

Solution: Add rustdoc comments and usage examples, along with license
and simple readme file

transitions

Solution: Try to design a different API, based on a builder syntax

Vladimir Lushnikov authored Jun 07, 2018 and Vladimir committed Jun 07, 2018

Solution: Add a simple luks_dump (almost equivalent to `cryptsetup luksDump`)

The API is likely to change after this example

Vladimir Lushnikov authored Jun 07, 2018 and Vladimir committed Jun 07, 2018

Solution: Add constants, bump patch version, add deprecation warnings

Vladimir Lushnikov authored Jun 06, 2018 and Vladimir committed Jun 07, 2018

Solution: Fix the test

Do some housekeeping with versions