[IMP] Adds a Vim plugin which shows a git diff in the 'gutter'

[hbto]

[IMP] Adds a Vim plugin which shows a git diff in the 'gutter' (sign column)

vim-gitgutter

[hbto]

@moylop260 @ruiztulio @Angelfentanez

Could you please check if this can be approved

Regards

[moylop260]

Could you enable it just if the environment variable GIT_STATUS is enabled too?

In order to avoid a regression issue:

• [REF] odoo-shippable: Slow vim open #207

[hbto]

I will stick for a while with your proposal of avoid a regression:

vim-signify is what I was looking for but I can that it actually was because of performance issues.

Let me keep trying with you approach.

Of enabling through Environment Vars.

Regards