pass arguments to determine the type of post

- (none),  for normal blog post with a title
- `note`,  for a post without a title
- `image`, for an image post
- `reply`, for a post replying to something with a url
- `like`,  for a little like post (don't really make these any more)

```plaintext
./blogthing
./blogthing note
./blogthing image
./blogthing reply <<some url>>
./blogthing like <<some url>>
```

Question -- what about being able to pass the an image, or directory of images to the image flag to automatically build them, maybe pre-process the image before upload?

```
./blogthing image dither ~/path/to/an/image.png
./blogthing image ~/path/to/an/image.png
```