Updated install.php to allow for CLI Arguments

- Added the ability to use the following arguments when install VuFind.
  - 'use-defaults' => 'Use VuFind Defaults to Configure' (Already there)
  - 'overridedir=s' => "Where would you like to store your local settings? [{$baseDir}/local]"
  - 'module-name=w' => 'What module name would you like to use?'
  - 'basepath=s' => 'What base path should be used in VuFind\'s URL? [/vufind]'
  - 'multisite-w' => 'Specify we are going to setup a multisite. Options are: directory and host', (Already there, added options)'
  - 'hostname=s' => 'Specify the hostname for the VuFind Site, this is used when multisite=2'
  - 'non-interactive' => 'Use settings if provided via arguments, otherwise use defaults'