Improve readme

[marcospgp]

• What unit is --limit specified in? An integer representing a number of posts? A timestamp representing a date?
• What is headless mode?

[nacimgoura]

--limit specifies the number of post (integer).
Headless mode is the headless for chrome (https://developers.google.com/web/updates/2017/04/headless-chrome)

[marcospgp]

You should add that on the readme! 😄

Also, are there any plans to add a similar limit but instead of a number of posts, specifying a date?

[nacimgoura]

in the readme it is already marked "get only the number of post defined by the limit" for --limit. It has no plan to add a similar limit but instead of a number of posts, specifying a date. you can do a PR if you are interested.

[marcospgp]

I think get only the number of post defined by the limit is too ambiguous, but since I already know that it represents the number of posts, fine by me! 😄

Thanks!