Patches for issues #373 and #374

These are the patches for the two issues I opened (#373 - "Config Tool plugin generates error for Shinken _internal_host_up command" and #374 - "business_impact descriptions cannot be changed in Config Tool plugin") as a pull request.  I've not used Git or GitHub before, but on reading the docs this seems to be a more sensible thing to do than patches in pastebin.