Include a graphical representation of "DIFF" utility to compare changes

[gridhead]

Check Duplicate issue Nope. No copycats here.

Pitch your idea/new feature to add As a follow up to #76 where multiple versions of the same file would be stored as snapshots of the contents at any given point of time, switching between them should not be inconsequential. A graphical representation of a diff utility to show the differences between the versions with respect to the lines that have been added, removed and changed would be appreciated. This should pop up whenever a user is switching between versions so that based on that representation - the user can decide should they switch or not to the version of their choice.