UI/API changes

• NEW: Path Analysis tool
• CHANGE: Probe detail results: add download to traceroute path analysis
• FIX: Probe detail results: better fit IPv6/hostname in traceroute path analysis
• FIX: Probe detail results: series hover detection in non full resolutions
• TWEAK: Improve Khipu zoom responsiveness
• TWEAK: Probe detail results: date formatting in traceroute path analysis