Release 3.4.0

Pyarmor v3.4 introduces a group new commands. For a simple package,
use command obfuscate to obfuscate scripts directly. For
complicated package, use Project to manage obfuscated scripts.

Project includes 2 files, one configure file and one project
capsule. Use manifest template string, same as MANIFEST.in of Python
Distutils, to specify the files to be obfuscated.

To create a project, use command init, use command info to
show project information. config to update project settings, and
build to obfuscate the scripts in the project.

Other commands, benchmark to metric performance, hdinfo to
show hardware information, so that command licenses can generate
license bind to fixed machine.

All the old commands capsule, encrypt, license are
deprecated, and will be removed from v4.

A new document src/user-guide.md is written for this new version.