[Tagging] Bitcoin: Distinction of purchase through website and cash register/Point of sale

[Anita Andersson]

Since payment:bitcoin=yes is a de facto and used tag and since 
payment:website:bitcoin=yes is not, I would suggest a combined usage of 
payment:bitcoin=yes and payment:website:bitcoin=yes until the new tag is 
chosen by more mappers for their use cases. I'm considering using the 
combination for the moment so that backwards compatibility is maintained.