Add diff-refine-{added,removed} faces
Add diff-refine-{added,removed} faces

These are used by tools like Magit to show which specific text changed
in a changed line (as opposed to added/removed whole lines, which is
what diff-{added,removed} shows).

In order to mimic the behaviour shown by tools like GitHub I've just
reversed the corresponding whole line faces so they stand out.

gugek/emacs-color-theme-solarized,calve/emacs-color-theme-solarized,ramLlama/emacs-color-theme-solarized,bradleywright/emacs-color-theme-solarized,bradwright/emacs-color-theme-solarized,dcherian/emacs-color-theme-solarized,sellout/emacs-color-theme-solarized,junag/emacs-color-theme-solarized,dgoel/emacs-color-theme-solarized,lokiiart/emacs-color-theme-solarized,mattduck/emacs-color-theme-solarized