Replaced shebangs with /usr/bin/env call

This way the environment can decide which interpreter got to be used. It's absolutly usefull if we try out other ruby versions or to use another path for the ruby binary.
Removed locale_additions functionality

As the i18n content is now always stored within the localization files we don't need the locale_additions anymore. And of course we don't need this extraction methods either.
Use correct command line

Use the correct command line instead a shortcut that will be removed in
a future version within another commit
Added copyright to generated navigation
Added single link for primary menu entries
Add crowbar-applied attribute in barclamp_install

Whenever an unknown barclamp is installed, check whether it has the
crowbar-applied attribute in the schema and add it if not.

This will catch barclamps from other sources.
Merge pull request #2044 from bkutil/add_crowbar_applied

Add crowbar-applied attribute in barclamp_install
Merge pull request #2035 from tboerger/feature/cleanup

Cleanup backported from rails4 branch