Jqfpy

- fix `--show-none` option, always ignored, in 0.6.0

- add `--show-none` (default, if return value is None, doesn't write to stdout)
- add raw format
- add short option `-a` and `-u` (drop `--ascii-output` asa `-a`)

- change arguments order, h.dumpfile (41)
- fix bug for get() (37)

- fix bug for h.dumpfile()

- add h.loadfile() function (35)

- h.dumpfile() with raw option