Added the ability to customize keyboard shortcuts; optional
keyboard shortcuts for opening and closing parent nodes found with
a search; shortcuts for browsing nodes (lowercase / uppercase
letters for jumping forward / backward to nodes which start with
the letter); incremental searches with the "/" shortcut; a command
to set a node's data type quickly; several linking field types
("URL", "path", "email" and "picture") with appropriate treatment;
"Choice" and "Combination" field types (each enables selection from
a customized list of strings); and data output font customization.
Improved the window layout (three right views divided into upper
sections for the selection's data and lower sections for the data
from the selection's children); and printing (font customization
and default page size).