v1.1.0 Unification of scroll and focus

Feature fix(Mon Jan 12)

• Unification of scroll-left/right to focus.(@rekado #18)
• This feature allows us to have unifed way mostly for those desiring scroll feature.
• The pull-request can be viewed here: #19

void move_horizontal(void *arg, Base &base, bool forward, bool window_based, bool animate, bool change_focus);

• This fix included addition of move_horizontal function.

• Fixed issue of hot reloading was caused by SHIFT macro.