Installing Luggage via Drush 8.0-dev errors out

[jackpolifka]

After cloning luggage, I attempted to use the install scripts to set everything up. When bash ./scripts/build_luggage_isu.sh is run, an error appears and reads Unknown option: --component. See drush help site-alias for available options. To suppress this error, add the option --strict=0. According to drush help site-alias, component is not an option for the command.

Seems to be similar to #14.

[rlfrahm]

The build scripts currently only accommodate Drush 5. After looking over how much different some of the commands are between versions, the easiest approach is probably to just include if...elseif statements that correspond to each Drush version. Similar to the solution proposed in #14.

@jrearick, @clouseau?