added member_signup_processing feature and steps
Separate xero support into separate file
Create separate InvoicerSupport helper functions
Rename generic event_details to specific attendee_monitor version
added signup_processor_support.rb, defined create_invoicer_membership_hash in invoicer_support.rb
added required fields to create_signup_processor_membership_hash
Check for events object before using it in support methods
Rename vat number to tax number internally
fixed variable name issue with po_number
broke some steps out from eventbrite_steps into more descriptively named files
massive tidy up of features and reworked signup_processor
Fix conflicts
Merge pull request #153 from theodi/feature-106-signup-processor

Feature 106 signup processor