Add donation info
Introducing PasswordHash

By @fraga, replaces PR #49 - consolidates all the commits into one. Per
@fraga there's a false negative that still needs to be resolved.
Rework

This changes crypto_pwhash_scryptxsalsa208sha256 to
crypto_pwhash_scryptxsalsa208sha256_str, simplifies the interface, etc.
Update documentation
Merge pull request #51 from adamcaudill/fraga_ImplementCryptoPwHash

Introducing PasswordHash
Use easy crypto_box methods

This switches to crypto_box_easy and crypto_box_open_easy. This also
adds backwards compatibility for data encrypted in the older versions.
Removed unused const
Merge pull request #53 from adamcaudill/crypto_box_easy

Convert to crypto_box_easy & crypto_box_open_easy
Update to libsodium 0.7.0
Merge pull request #54 from adamcaudill/libsodium_070

Update to libsodium 0.7.0
0.4.0-beta2