Manage encryption keys internally

v3.1.0

Update properties

Refactor to use interface

v3.0.0

Update properties.

Avoid null pointer exception

Bug fix by @ptrstpp950

Encryption and clear verification bug fixes

Bug fixes for #70 and verification of clear signed files produced in GPG

Add clear sign and verify clear signed files

Fix for #40

Sync and message name updates

Allow encrypted message name to be set, made sync methods properly sync (#50), improved parameter docmentation, add async tests (#43).

Overwrite existing keys on create

Merge pull request #49 from mattosaurus/development

GenerateKey should overwrite file

HashAlgorithmTag options

Add HashAlgorithmTag to constructor and strongly sign package

Async and large file fixes

Methods changed to be async first where possible and memory handling updated to better cope with large files.

DecryptAndVerify fixes

Updates to DecryptAndVerify, thanks to @James-Lappin