ncm-ccm: handle ccm-fetch with noquattor present

it's ok to prevent from major stacktrace uglyness on next run, sure. but there are some corner cases i'm not happy with that won't get resolved anyway (sure, we can make it as easy as possible). 
i'm getting in favour of providing some simple script "help" set and remove NOQUATTOR; it can also take care of e.g. running ccm-initialiase if needed, and do a ccm-fetch when NOQUATTOR is disabled? (remember the quattor-enable / quattor-disable script we used to have at UGent?)