Remove cache from global header.
Merge pull request #581 from sharetribe/remove-cache

Remove cache from global header.
Create Entity Proc, which returns a Hash when run
Fix PaypalAccount view to use hash syntax, not dot
Merge pull request #584 from sharetribe/hash-entities2

Hash entities: Return a lambda which creates a new Hash
Boilerplate for PaypalService::Merchant
setup billing agreement api call
Create billing agreement api call
Hide address fields when requesting bill agr