v0.5.1

Release v0.5.1 contains the following changes:

• Fix for engine ctrl message numbers out of sync - a41d92f
• Update .gitignore to exclude release package files - db2321b
• Corrections to README.md file. - a7a9894

Initial release of Intel® QuickAssist Technology engine for OpenSSL-1.1.0

Initial release of Intel® QuickAssist Technology engine for OpenSSL-1.1.0 supporting the asynchronous JOB infrastructure.