Add new icons for new intellectual_property statuses

[damisul]

Previously we had only two statuses: copyrighted and public domain (and used (c) sign and striked-out (c) sign for them).

But now we have

• by_permission
• permission_for_all
• permission_for_selected
• orphan
• unknown

statuses

Perhaps we can consider adding new icons for them. As far as I see we use custom font for icons, so it will take a while. When font is ready we'll need to update single method: https://github.com/abartov/bybeconv/blob/6bb7fe0db4c007df28234c9f54aa00dc9417b671/app/helpers/application_helper.rb#L162