The prompts will only ever appear in toggl start if you are passing -i
Interactive mode will only prompt field you haven't explicitly passed to the command line (if you pass --description foo it will just use that instead of asking for a description)
All default values come from the plain default time entry, but in the future they will be configurable, courtesy of #45
Closes #47
This changes the API so that:
--fzfis now globally configurabletoggl startif you are passing-i--description fooit will just use that instead of asking for a description)