Clean-up dependencies

[doyubkim]

Jet Framework depends on several other libraries, and some of them are outdated or not quite utilized from Jet.

Here’s the wishlist:

• Deprecate libobj and use tinyobj by @syoyo (https://github.com/syoyo/tinyobjloader) - Issue Replace libobj library with tinyobj #172
• Deprecate pystring and reimplement necessary portions
• Deprecate winix (getopt) and use one of modern libraries such as argparse - Issue Replace winix library with Clara #166
• Update cnpy