fix path regexp
change JSON URL to support static file
improve error message
refactoring
add scroll pagination feature to the pack index view
refactoring
add pack index digest

to convert from sha1 to offset number using static JSON file.
add loading indicator
find Packed Object from static JSON file
bugfix: load packed-refs
add WrappedObject class
add add dump directory option value
when dumping, root is set to nil
output JSON of WrappedObject
add DirecotoriesDumper
add ObjectsDumper
add dumper classes