1.5.1

CHANGES:

• Albatross_influx: drop leading ':' if path should be dropped (#114 @hannesm)
• FreeBSD packaging: rename albatross_stat to albatross_stats (#113 @hannesm)
• Refactor albatross BHyve stat collection (to avoid exception in List.combine)
  (#116 @reynir @hannesm)
• Albatross-client-update: adapt URLs to current builder-web deployment (#117
  @hannesm)
• Albatross-client: allow passing a mac address explicitly to create for each
  network interface (#107 @reynir)