Create completion scripts; Update install script

- Create bash completion for boom, grunt, hub and wp libraries
- Update all completion file names to match $(brew
  --prefix)/etc/bash_completion.d/ pattern (ie - no .sh extension)
- Update completion conf file to point to correct brew location
- Update bash_profile to include completion conf file
- Update link_files helper script to drop ${HOME} reference as
  completion files need to linked to $(brew
  --prefix)/etc/bash_completion.d

Issue: #65
Update version

Bump version 0.1.0 to 0.1.1 as this is a minor bug fix/enchancement.

Issue: #65