Version v0.1.29 release

• http-access log now includes User-Agent header value.
• directly listing now includes the upper-level directory to go back: "../"
• media-template feature additions:
  • keyboard shortcuts for media-template
    • f/F --> Fullscreen toggle.
    • previous slide.
    • next slide.
  • mobile swipe gestures
• New cli-option:
  • ability to configure the max number of concurrent connections. (-c | --connections)
• Development:
  • Graceful handling of server execution and shutdown to account for thread-wait-join workflow differences of script execution vs binary execution.

Full Changelog: v0.1.28...v0.1.29