Adds jumping to previous and next changes.
Adds jumping to previous and next changes.

- Adds two new commands: "git_gutter_next_change" and "git_gutter_previous_change"

tushortz/GitGutter,biodamasceno/GitGutter,tushortz/GitGutter,biodamasceno/GitGutter,natecavanaugh/GitGutter,biodamasceno/GitGutter,michaelhogg/GitGutter,michaelhogg/GitGutter,akpersad/GitGutter,jisaacks/GitGutter,tushortz/GitGutter,akpersad/GitGutter,robfrawley/sublime-git-gutter,tushortz/GitGutter,natecavanaugh/GitGutter,robfrawley/sublime-git-gutter,michaelhogg/GitGutter,akpersad/GitGutter,robfrawley/sublime-git-gutter,robfrawley/sublime-git-gutter,natecavanaugh/GitGutter,biodamasceno/GitGutter,natecavanaugh/GitGutter,akpersad/GitGutter,michaelhogg/GitGutter