Update install script

- Update formatting on print helper functions
- Create TODOs
- Update homebrew installation with suggested `brew doctor` command
- Update pip installation with suggested `brew linkapps` command
- Remove php55 brew installation from brew install script
- Update brew install script with new placement of php55 installation
  since it depends on the homebrew-php tap in a previous process
- Update all child processes with source of lib/utils functions for
  cleaning printing

Issue: #9