add listings schema, change id-fields to strings, annotate batch objects as preview only
v0.2.0
fix rake
add beta-information to gem name & description
readme
Changed sepa_mandate customer_id to be a string.
Changed transaction return_transaction_id to be a string.
marked batch objects as preview
Merge pull request #1 from razielgn/convert-remaining-ids-to-strings

Convert remaining IDs to strings
pluralized counts
Merge branch 'master' of github.com:fidor/fidor_schema
v0.2.2
changed a field description for title
Merge branch 'master' of github.com:fidor/fidor_schema

Conflicts:
	schema/v1.0/batch_direct_debit.json
	schema/v1.0/batch_transfer.json
API-189 altered amount and added currency
Merge branch 'currency_amount' of github.com:fidor/fidor_schema into currency_amount