Improve claimit.py intro docs
Improve claimit.py intro docs

Any pagegenerator can be used, not just categories.

Change-Id: I35fb61b9a4103978a7c0298517fb9552c0769981

npdoty/pywikibot,wikimedia/pywikibot-core,jayvdb/pywikibot-core,h4ck3rm1k3/pywikibot-core,hasteur/g13bot_tools_new,Darkdadaah/pywikibot-core,hasteur/g13bot_tools_new,smalyshev/pywikibot-core,hasteur/g13bot_tools_new,h4ck3rm1k3/pywikibot-core,jayvdb/pywikibot-core,wikimedia/pywikibot-core,happy5214/pywikibot-core,npdoty/pywikibot,magul/pywikibot-core,happy5214/pywikibot-core,darthbhyrava/pywikibot-local,PersianWikipedia/pywikibot-core,magul/pywikibot-core,Darkdadaah/pywikibot-core