Where were you a few hours go to prevent me from having to go through the painful process of installing the plugin? 
That is indeed what I wanted.
A few suggestions, if you think they are worth implementing:
1 - Ability to change the color of the text. In my particular case, I like it in the original color. On my non-professional UI expertise, I like to see red only when something is over the limit, for example, too many characters that will throw an error if I try to save, or if it doesn’t follow a specific format (e.g. a URL, an email, etc). The red for me here automatically looks “weird”, because it’s almost as if something is already wrong, even before I did anything.
2 - Showing something like “0/15” kinda feels like: “you haven’t typed anything on your limit of just 15 characters”. I know that people eventually understand what that means, but I always like to have everything as clear as possible, even for people who know what that means. So in this case, offering a few different options would be great, one of them being 0 of N required.
I downloaded the ZIP from GitHub and made those modifications for myself and now it looks like this:
It just feels less intrusive for me and more self-explanatory, without taking too much space. What do you think?