v1.7.4

No backwards incompatible changes here.

This release is centered around internal refactoring to detach node from server - see more details in #186.

Features

• optionally create PID file using --pid_file command line option.
• create connections in separate goroutines to slightly improve GC (and therefore reduce memory usage).

Internal (for developers/contributors)

• Using Go 1.8.3 for builds