add rpmlintrc filters

 - add filter for `non-conffile-in-etc (*.example)` we're only supplying an example file
 - add filter for `non-conffile-in-etc (/etc/default/boomerang-express)` will be sourced
   when executing `/etc/(rc.d/|)init.d/boomerang-express` to configure OS-specific
   directories to override defaults in init.d script
 - add filter for `dangerous-command-in-%post` as `chmod` for files is called by easy-rpm
   in `%post` block. Should be fixed upstream as RPM supports `%attr()` directive preceeding
   a file in `%files` block
Fix missing LSB information in init script

  - also default start/stop init-levels to none inorder to be conform with
    most RPM-distros
  - add reload command and status command to be compliant with most
    init script calling convention
add reload/status call to usage info
add URLs to Repository and Homepage to package.json
extend Gruntfile

  - set default exitCode to 0 as only warnings are now raised upon calling
    `grunt exec:lint` task.
  - point to proper License in package.json
  - point to properl URL in package.json
  - set buildArch to `noarch` as this is only scripts