allow setting initial index

Update to use go mods

add check for supporting colors in terminal before add colors

Format the code to gofmt standards

Action is now the only default function

I removed the option for MultipleAction and replaced with AllowMultiple

Removing go vendor from travis build

Replaced vendoring with gopkg.in

Removing go vendor from travis build

Using gopkg.in instead of vendoring

Removing go vendor from travis build