Changes:
• Export to DynECT Managed DNS service (https://github.com/msimerson/NicTool/wiki/Export-to-DynECT-Managed-DNS)
• Exports to BIND using nsupdate (https://github.com/msimerson/NicTool/wiki/Export-to-BIND-nsupdate) (thanks abeeson!)
• Exports to Knot (https://github.com/msimerson/NicTool/wiki/Install-NSD) & NSD (https://github.com/msimerson/NicTool/wiki/Install-NSD) improved and documented
• SQL: added nt_nameserver_export_type table
• SQL: added nt_nameserver.address6 (IPv6 address)
• SQL: added nt_nameserver.remote_login
• BIND exports, don't delete zone file if zone deleted and re-added
• more reliable imports of ip6.arpa zones
• more reliable sql/upgrade.pl
• more user-friendly sql/create_tables.pl
• API: return nt_zone_id in edit_zone results
Much of the documentation has been improved and moved to the GitHub wiki (https://github.com/msimerson/NicTool/wiki).