Added Feature Bubble Index

[Th3Whit3Wolf]

I saw another version of vim-buffet with this feature so I thought I should send a pull request.

Adds variable g:buffet_bubble_index

Default:

let g:buffet_bubble_index = 0

When set to 1 buffers are displayed as
➊ Buffer Name ➋ Buffer Name ➌ Buffer Name ➍

instead of

1 Buffer Name 2 Buffer Name 3 Buffer Name 4 Buffer Name

This will work up to 50, which I doubt anyone will get to.

[bagrat]

Thanks for the PR @Th3Whit3Wolf !

What I don't like about the bubble symbols themselves is that they have different sizes and starting from 21 the color is inverted, which might confuse users potentially implying some other meaning. This said I am not inclined to adding this feature. However, given it is configurable, I'd reconsider if you explain the motivation of having this.

[Th3Whit3Wolf]

I agree, I couldn't find any more bubble numbers of the same style or I would have put them in there. However I do think the majority of people will never notice that they change because 21 is a lot.

The only real motivation I have for it is that it looks awesome