Added dump/load to IndexTool
Added dump/load to IndexTool

IndexTool now supports dumping data out of tables into JSON, and loading
it to other tables from a file.

Implementation works but isn't well tested. Mostly to support working on
a test database for index_server development.

hleeldc/aikuma,aikuma/aikuma,hleeldc/aikuma,hleeldc/aikuma,aikuma/aikuma,lisaslyis/aikuma,aikuma/aikuma,lisaslyis/aikuma,aikuma/aikuma,lisaslyis/aikuma,hleeldc/aikuma,hleeldc/aikuma,lisaslyis/aikuma,lisaslyis/aikuma,aikuma/aikuma