Incremental/restartable parser

[akheron]

Implement an incremental/restartable parser that doesn’t require all the input available when the parsing begins, i.e. the user could feed the parser with input data as soon as it is available. This requires some major refactoring to the parser, the lexer and the UTF-8 input layer.

[phst]

Isn't this essentially done using json_load_callback?