v0.4.0

This is a pretty big release full of QoL improvements and bug fixes, I hope you enjoy!

Change-log:

• More verbose output when using -v flag
• Properly exits again when -version or -license flags are used again
• Uses xxhash instead of sha224 for local hash DB (will rebuild hash DB on first run, which will trigger re-adds)
• Deleting directories properly empties entries from local DB (#18)
• Now displays devel for version number on untagged releases
• Does less files/mkdir calls, greatly speeds up adding many files (#29)
• Moving directories functions as expected now (#30)
• README has a bit more detail for new users